René Chrétien had noticed the 15x15 composite (4) magic square and showed me it is possible to use the method to construct magic squares of even orders as well.
Construct the 24x24 magic square by using 16 proportional 6x6 magic squares. The squares are proportional because all 16 magic 6x6 squares have the same magic sum of (1/4 x 6924 = ) 1731. We use the method with reflecting grids (6x6) to produce the magic 6x6 squares. As row coordinates don't use 0 up to 5 but use 0 up to (16x6 -/- 1 = ) 95 instead. Take care that the sum of the row coordinates in each 6x6 square is the same (0+31+63+32+64+95 = 1+30+62+33+65+94 = ... = 15+16+48+47+79+80 = 285) to get proportional squares.
1x row coordinate +96x column coordinate + 1 = magic 6x6 square
0 | 31 | 63 | 32 | 64 | 95 | 0 | 5 | 0 | 5 | 5 | 0 | 1 | 512 | 64 | 513 | 545 | 96 | ||
95 | 31 | 32 | 63 | 64 | 0 | 1 | 1 | 4 | 4 | 1 | 4 | 192 | 128 | 417 | 448 | 161 | 385 | ||
0 | 64 | 32 | 63 | 31 | 95 | 3 | 2 | 2 | 2 | 3 | 3 | 289 | 257 | 225 | 256 | 320 | 384 | ||
95 | 64 | 32 | 63 | 31 | 0 | 2 | 3 | 3 | 3 | 2 | 2 | 288 | 353 | 321 | 352 | 224 | 193 | ||
95 | 31 | 63 | 32 | 64 | 0 | 4 | 4 | 1 | 1 | 4 | 1 | 480 | 416 | 160 | 129 | 449 | 97 | ||
0 | 64 | 63 | 32 | 31 | 95 | 5 | 0 | 5 | 0 | 0 | 5 | 481 | 65 | 544 | 33 | 32 | 576 | ||
1 | 30 | 62 | 33 | 65 | 94 | 0 | 5 | 0 | 5 | 5 | 0 | 2 | 511 | 63 | 514 | 546 | 95 | ||
94 | 30 | 33 | 62 | 65 | 1 | 1 | 1 | 4 | 4 | 1 | 4 | 191 | 127 | 418 | 447 | 162 | 386 | ||
1 | 65 | 33 | 62 | 30 | 94 | 3 | 2 | 2 | 2 | 3 | 3 | 290 | 258 | 226 | 255 | 319 | 383 | ||
94 | 65 | 33 | 62 | 30 | 1 | 2 | 3 | 3 | 3 | 2 | 2 | 287 | 354 | 322 | 351 | 223 | 194 | ||
94 | 30 | 62 | 33 | 65 | 1 | 4 | 4 | 1 | 1 | 4 | 1 | 479 | 415 | 159 | 130 | 450 | 98 | ||
1 | 65 | 62 | 33 | 30 | 94 | 5 | 0 | 5 | 0 | 0 | 5 | 482 | 66 | 543 | 34 | 31 | 575 | ||
2 | 29 | 61 | 34 | 66 | 93 | 0 | 5 | 0 | 5 | 5 | 0 | 3 | 510 | 62 | 515 | 547 | 94 | ||
93 | 29 | 34 | 61 | 66 | 2 | 1 | 1 | 4 | 4 | 1 | 4 | 190 | 126 | 419 | 446 | 163 | 387 | ||
2 | 66 | 34 | 61 | 29 | 93 | 3 | 2 | 2 | 2 | 3 | 3 | 291 | 259 | 227 | 254 | 318 | 382 | ||
93 | 66 | 34 | 61 | 29 | 2 | 2 | 3 | 3 | 3 | 2 | 2 | 286 | 355 | 323 | 350 | 222 | 195 | ||
93 | 29 | 61 | 34 | 66 | 2 | 4 | 4 | 1 | 1 | 4 | 1 | 478 | 414 | 158 | 131 | 451 | 99 | ||
2 | 66 | 61 | 34 | 29 | 93 | 5 | 0 | 5 | 0 | 0 | 5 | 483 | 67 | 542 | 35 | 30 | 574 | ||
3 | 28 | 60 | 35 | 67 | 92 | 0 | 5 | 0 | 5 | 5 | 0 | 4 | 509 | 61 | 516 | 548 | 93 | ||
92 | 28 | 35 | 60 | 67 | 3 | 1 | 1 | 4 | 4 | 1 | 4 | 189 | 125 | 420 | 445 | 164 | 388 | ||
3 | 67 | 35 | 60 | 28 | 92 | 3 | 2 | 2 | 2 | 3 | 3 | 292 | 260 | 228 | 253 | 317 | 381 | ||
92 | 67 | 35 | 60 | 28 | 3 | 2 | 3 | 3 | 3 | 2 | 2 | 285 | 356 | 324 | 349 | 221 | 196 | ||
92 | 28 | 60 | 35 | 67 | 3 | 4 | 4 | 1 | 1 | 4 | 1 | 477 | 413 | 157 | 132 | 452 | 100 | ||
3 | 67 | 60 | 35 | 28 | 92 | 5 | 0 | 5 | 0 | 0 | 5 | 484 | 68 | 541 | 36 | 29 | 573 | ||
4 | 27 | 59 | 36 | 68 | 91 | 0 | 5 | 0 | 5 | 5 | 0 | 5 | 508 | 60 | 517 | 549 | 92 | ||
91 | 27 | 36 | 59 | 68 | 4 | 1 | 1 | 4 | 4 | 1 | 4 | 188 | 124 | 421 | 444 | 165 | 389 | ||
4 | 68 | 36 | 59 | 27 | 91 | 3 | 2 | 2 | 2 | 3 | 3 | 293 | 261 | 229 | 252 | 316 | 380 | ||
91 | 68 | 36 | 59 | 27 | 4 | 2 | 3 | 3 | 3 | 2 | 2 | 284 | 357 | 325 | 348 | 220 | 197 | ||
91 | 27 | 59 | 36 | 68 | 4 | 4 | 4 | 1 | 1 | 4 | 1 | 476 | 412 | 156 | 133 | 453 | 101 | ||
4 | 68 | 59 | 36 | 27 | 91 | 5 | 0 | 5 | 0 | 0 | 5 | 485 | 69 | 540 | 37 | 28 | 572 | ||
5 | 26 | 58 | 37 | 69 | 90 | 0 | 5 | 0 | 5 | 5 | 0 | 6 | 507 | 59 | 518 | 550 | 91 | ||
90 | 26 | 37 | 58 | 69 | 5 | 1 | 1 | 4 | 4 | 1 | 4 | 187 | 123 | 422 | 443 | 166 | 390 | ||
5 | 69 | 37 | 58 | 26 | 90 | 3 | 2 | 2 | 2 | 3 | 3 | 294 | 262 | 230 | 251 | 315 | 379 | ||
90 | 69 | 37 | 58 | 26 | 5 | 2 | 3 | 3 | 3 | 2 | 2 | 283 | 358 | 326 | 347 | 219 | 198 | ||
90 | 26 | 58 | 37 | 69 | 5 | 4 | 4 | 1 | 1 | 4 | 1 | 475 | 411 | 155 | 134 | 454 | 102 | ||
5 | 69 | 58 | 37 | 26 | 90 | 5 | 0 | 5 | 0 | 0 | 5 | 486 | 70 | 539 | 38 | 27 | 571 | ||
6 | 25 | 57 | 38 | 70 | 89 | 0 | 5 | 0 | 5 | 5 | 0 | 7 | 506 | 58 | 519 | 551 | 90 | ||
89 | 25 | 38 | 57 | 70 | 6 | 1 | 1 | 4 | 4 | 1 | 4 | 186 | 122 | 423 | 442 | 167 | 391 | ||
6 | 70 | 38 | 57 | 25 | 89 | 3 | 2 | 2 | 2 | 3 | 3 | 295 | 263 | 231 | 250 | 314 | 378 | ||
89 | 70 | 38 | 57 | 25 | 6 | 2 | 3 | 3 | 3 | 2 | 2 | 282 | 359 | 327 | 346 | 218 | 199 | ||
89 | 25 | 57 | 38 | 70 | 6 | 4 | 4 | 1 | 1 | 4 | 1 | 474 | 410 | 154 | 135 | 455 | 103 | ||
6 | 70 | 57 | 38 | 25 | 89 | 5 | 0 | 5 | 0 | 0 | 5 | 487 | 71 | 538 | 39 | 26 | 570 | ||
7 | 24 | 56 | 39 | 71 | 88 | 0 | 5 | 0 | 5 | 5 | 0 | 8 | 505 | 57 | 520 | 552 | 89 | ||
88 | 24 | 39 | 56 | 71 | 7 | 1 | 1 | 4 | 4 | 1 | 4 | 185 | 121 | 424 | 441 | 168 | 392 | ||
7 | 71 | 39 | 56 | 24 | 88 | 3 | 2 | 2 | 2 | 3 | 3 | 296 | 264 | 232 | 249 | 313 | 377 | ||
88 | 71 | 39 | 56 | 24 | 7 | 2 | 3 | 3 | 3 | 2 | 2 | 281 | 360 | 328 | 345 | 217 | 200 | ||
88 | 24 | 56 | 39 | 71 | 7 | 4 | 4 | 1 | 1 | 4 | 1 | 473 | 409 | 153 | 136 | 456 | 104 | ||
7 | 71 | 56 | 39 | 24 | 88 | 5 | 0 | 5 | 0 | 0 | 5 | 488 | 72 | 537 | 40 | 25 | 569 | ||
8 | 23 | 55 | 40 | 72 | 87 | 0 | 5 | 0 | 5 | 5 | 0 | 9 | 504 | 56 | 521 | 553 | 88 | ||
87 | 23 | 40 | 55 | 72 | 8 | 1 | 1 | 4 | 4 | 1 | 4 | 184 | 120 | 425 | 440 | 169 | 393 | ||
8 | 72 | 40 | 55 | 23 | 87 | 3 | 2 | 2 | 2 | 3 | 3 | 297 | 265 | 233 | 248 | 312 | 376 | ||
87 | 72 | 40 | 55 | 23 | 8 | 2 | 3 | 3 | 3 | 2 | 2 | 280 | 361 | 329 | 344 | 216 | 201 | ||
87 | 23 | 55 | 40 | 72 | 8 | 4 | 4 | 1 | 1 | 4 | 1 | 472 | 408 | 152 | 137 | 457 | 105 | ||
8 | 72 | 55 | 40 | 23 | 87 | 5 | 0 | 5 | 0 | 0 | 5 | 489 | 73 | 536 | 41 | 24 | 568 | ||
9 | 22 | 54 | 41 | 73 | 86 | 0 | 5 | 0 | 5 | 5 | 0 | 10 | 503 | 55 | 522 | 554 | 87 | ||
86 | 22 | 41 | 54 | 73 | 9 | 1 | 1 | 4 | 4 | 1 | 4 | 183 | 119 | 426 | 439 | 170 | 394 | ||
9 | 73 | 41 | 54 | 22 | 86 | 3 | 2 | 2 | 2 | 3 | 3 | 298 | 266 | 234 | 247 | 311 | 375 | ||
86 | 73 | 41 | 54 | 22 | 9 | 2 | 3 | 3 | 3 | 2 | 2 | 279 | 362 | 330 | 343 | 215 | 202 | ||
86 | 22 | 54 | 41 | 73 | 9 | 4 | 4 | 1 | 1 | 4 | 1 | 471 | 407 | 151 | 138 | 458 | 106 | ||
9 | 73 | 54 | 41 | 22 | 86 | 5 | 0 | 5 | 0 | 0 | 5 | 490 | 74 | 535 | 42 | 23 | 567 | ||
10 | 21 | 53 | 42 | 74 | 85 | 0 | 5 | 0 | 5 | 5 | 0 | 11 | 502 | 54 | 523 | 555 | 86 | ||
85 | 21 | 42 | 53 | 74 | 10 | 1 | 1 | 4 | 4 | 1 | 4 | 182 | 118 | 427 | 438 | 171 | 395 | ||
10 | 74 | 42 | 53 | 21 | 85 | 3 | 2 | 2 | 2 | 3 | 3 | 299 | 267 | 235 | 246 | 310 | 374 | ||
85 | 74 | 42 | 53 | 21 | 10 | 2 | 3 | 3 | 3 | 2 | 2 | 278 | 363 | 331 | 342 | 214 | 203 | ||
85 | 21 | 53 | 42 | 74 | 10 | 4 | 4 | 1 | 1 | 4 | 1 | 470 | 406 | 150 | 139 | 459 | 107 | ||
10 | 74 | 53 | 42 | 21 | 85 | 5 | 0 | 5 | 0 | 0 | 5 | 491 | 75 | 534 | 43 | 22 | 566 | ||
11 | 20 | 52 | 43 | 75 | 84 | 0 | 5 | 0 | 5 | 5 | 0 | 12 | 501 | 53 | 524 | 556 | 85 | ||
84 | 20 | 43 | 52 | 75 | 11 | 1 | 1 | 4 | 4 | 1 | 4 | 181 | 117 | 428 | 437 | 172 | 396 | ||
11 | 75 | 43 | 52 | 20 | 84 | 3 | 2 | 2 | 2 | 3 | 3 | 300 | 268 | 236 | 245 | 309 | 373 | ||
84 | 75 | 43 | 52 | 20 | 11 | 2 | 3 | 3 | 3 | 2 | 2 | 277 | 364 | 332 | 341 | 213 | 204 | ||
84 | 20 | 52 | 43 | 75 | 11 | 4 | 4 | 1 | 1 | 4 | 1 | 469 | 405 | 149 | 140 | 460 | 108 | ||
11 | 75 | 52 | 43 | 20 | 84 | 5 | 0 | 5 | 0 | 0 | 5 | 492 | 76 | 533 | 44 | 21 | 565 | ||
12 | 19 | 51 | 44 | 76 | 83 | 0 | 5 | 0 | 5 | 5 | 0 | 13 | 500 | 52 | 525 | 557 | 84 | ||
83 | 19 | 44 | 51 | 76 | 12 | 1 | 1 | 4 | 4 | 1 | 4 | 180 | 116 | 429 | 436 | 173 | 397 | ||
12 | 76 | 44 | 51 | 19 | 83 | 3 | 2 | 2 | 2 | 3 | 3 | 301 | 269 | 237 | 244 | 308 | 372 | ||
83 | 76 | 44 | 51 | 19 | 12 | 2 | 3 | 3 | 3 | 2 | 2 | 276 | 365 | 333 | 340 | 212 | 205 | ||
83 | 19 | 51 | 44 | 76 | 12 | 4 | 4 | 1 | 1 | 4 | 1 | 468 | 404 | 148 | 141 | 461 | 109 | ||
12 | 76 | 51 | 44 | 19 | 83 | 5 | 0 | 5 | 0 | 0 | 5 | 493 | 77 | 532 | 45 | 20 | 564 | ||
13 | 18 | 50 | 45 | 77 | 82 | 0 | 5 | 0 | 5 | 5 | 0 | 14 | 499 | 51 | 526 | 558 | 83 | ||
82 | 18 | 45 | 50 | 77 | 13 | 1 | 1 | 4 | 4 | 1 | 4 | 179 | 115 | 430 | 435 | 174 | 398 | ||
13 | 77 | 45 | 50 | 18 | 82 | 3 | 2 | 2 | 2 | 3 | 3 | 302 | 270 | 238 | 243 | 307 | 371 | ||
82 | 77 | 45 | 50 | 18 | 13 | 2 | 3 | 3 | 3 | 2 | 2 | 275 | 366 | 334 | 339 | 211 | 206 | ||
82 | 18 | 50 | 45 | 77 | 13 | 4 | 4 | 1 | 1 | 4 | 1 | 467 | 403 | 147 | 142 | 462 | 110 | ||
13 | 77 | 50 | 45 | 18 | 82 | 5 | 0 | 5 | 0 | 0 | 5 | 494 | 78 | 531 | 46 | 19 | 563 | ||
14 | 17 | 49 | 46 | 78 | 81 | 0 | 5 | 0 | 5 | 5 | 0 | 15 | 498 | 50 | 527 | 559 | 82 | ||
81 | 17 | 46 | 49 | 78 | 14 | 1 | 1 | 4 | 4 | 1 | 4 | 178 | 114 | 431 | 434 | 175 | 399 | ||
14 | 78 | 46 | 49 | 17 | 81 | 3 | 2 | 2 | 2 | 3 | 3 | 303 | 271 | 239 | 242 | 306 | 370 | ||
81 | 78 | 46 | 49 | 17 | 14 | 2 | 3 | 3 | 3 | 2 | 2 | 274 | 367 | 335 | 338 | 210 | 207 | ||
81 | 17 | 49 | 46 | 78 | 14 | 4 | 4 | 1 | 1 | 4 | 1 | 466 | 402 | 146 | 143 | 463 | 111 | ||
14 | 78 | 49 | 46 | 17 | 81 | 5 | 0 | 5 | 0 | 0 | 5 | 495 | 79 | 530 | 47 | 18 | 562 | ||
15 | 16 | 48 | 47 | 79 | 80 | 0 | 5 | 0 | 5 | 5 | 0 | 16 | 497 | 49 | 528 | 560 | 81 | ||
80 | 16 | 47 | 48 | 79 | 15 | 1 | 1 | 4 | 4 | 1 | 4 | 177 | 113 | 432 | 433 | 176 | 400 | ||
15 | 79 | 47 | 48 | 16 | 80 | 3 | 2 | 2 | 2 | 3 | 3 | 304 | 272 | 240 | 241 | 305 | 369 | ||
80 | 79 | 47 | 48 | 16 | 15 | 2 | 3 | 3 | 3 | 2 | 2 | 273 | 368 | 336 | 337 | 209 | 208 | ||
80 | 16 | 48 | 47 | 79 | 15 | 4 | 4 | 1 | 1 | 4 | 1 | 465 | 401 | 145 | 144 | 464 | 112 | ||
15 | 79 | 48 | 47 | 16 | 80 | 5 | 0 | 5 | 0 | 0 | 5 | 496 | 80 | 529 | 48 | 17 | 561 |
Put the 16 magic 6x6 squares in sequence together.
24x24 magic square
1 | 512 | 64 | 513 | 545 | 96 | 2 | 511 | 63 | 514 | 546 | 95 | 3 | 510 | 62 | 515 | 547 | 94 | 4 | 509 | 61 | 516 | 548 | 93 |
192 | 128 | 417 | 448 | 161 | 385 | 191 | 127 | 418 | 447 | 162 | 386 | 190 | 126 | 419 | 446 | 163 | 387 | 189 | 125 | 420 | 445 | 164 | 388 |
289 | 257 | 225 | 256 | 320 | 384 | 290 | 258 | 226 | 255 | 319 | 383 | 291 | 259 | 227 | 254 | 318 | 382 | 292 | 260 | 228 | 253 | 317 | 381 |
288 | 353 | 321 | 352 | 224 | 193 | 287 | 354 | 322 | 351 | 223 | 194 | 286 | 355 | 323 | 350 | 222 | 195 | 285 | 356 | 324 | 349 | 221 | 196 |
480 | 416 | 160 | 129 | 449 | 97 | 479 | 415 | 159 | 130 | 450 | 98 | 478 | 414 | 158 | 131 | 451 | 99 | 477 | 413 | 157 | 132 | 452 | 100 |
481 | 65 | 544 | 33 | 32 | 576 | 482 | 66 | 543 | 34 | 31 | 575 | 483 | 67 | 542 | 35 | 30 | 574 | 484 | 68 | 541 | 36 | 29 | 573 |
5 | 508 | 60 | 517 | 549 | 92 | 6 | 507 | 59 | 518 | 550 | 91 | 7 | 506 | 58 | 519 | 551 | 90 | 8 | 505 | 57 | 520 | 552 | 89 |
188 | 124 | 421 | 444 | 165 | 389 | 187 | 123 | 422 | 443 | 166 | 390 | 186 | 122 | 423 | 442 | 167 | 391 | 185 | 121 | 424 | 441 | 168 | 392 |
293 | 261 | 229 | 252 | 316 | 380 | 294 | 262 | 230 | 251 | 315 | 379 | 295 | 263 | 231 | 250 | 314 | 378 | 296 | 264 | 232 | 249 | 313 | 377 |
284 | 357 | 325 | 348 | 220 | 197 | 283 | 358 | 326 | 347 | 219 | 198 | 282 | 359 | 327 | 346 | 218 | 199 | 281 | 360 | 328 | 345 | 217 | 200 |
476 | 412 | 156 | 133 | 453 | 101 | 475 | 411 | 155 | 134 | 454 | 102 | 474 | 410 | 154 | 135 | 455 | 103 | 473 | 409 | 153 | 136 | 456 | 104 |
485 | 69 | 540 | 37 | 28 | 572 | 486 | 70 | 539 | 38 | 27 | 571 | 487 | 71 | 538 | 39 | 26 | 570 | 488 | 72 | 537 | 40 | 25 | 569 |
9 | 504 | 56 | 521 | 553 | 88 | 10 | 503 | 55 | 522 | 554 | 87 | 11 | 502 | 54 | 523 | 555 | 86 | 12 | 501 | 53 | 524 | 556 | 85 |
184 | 120 | 425 | 440 | 169 | 393 | 183 | 119 | 426 | 439 | 170 | 394 | 182 | 118 | 427 | 438 | 171 | 395 | 181 | 117 | 428 | 437 | 172 | 396 |
297 | 265 | 233 | 248 | 312 | 376 | 298 | 266 | 234 | 247 | 311 | 375 | 299 | 267 | 235 | 246 | 310 | 374 | 300 | 268 | 236 | 245 | 309 | 373 |
280 | 361 | 329 | 344 | 216 | 201 | 279 | 362 | 330 | 343 | 215 | 202 | 278 | 363 | 331 | 342 | 214 | 203 | 277 | 364 | 332 | 341 | 213 | 204 |
472 | 408 | 152 | 137 | 457 | 105 | 471 | 407 | 151 | 138 | 458 | 106 | 470 | 406 | 150 | 139 | 459 | 107 | 469 | 405 | 149 | 140 | 460 | 108 |
489 | 73 | 536 | 41 | 24 | 568 | 490 | 74 | 535 | 42 | 23 | 567 | 491 | 75 | 534 | 43 | 22 | 566 | 492 | 76 | 533 | 44 | 21 | 565 |
13 | 500 | 52 | 525 | 557 | 84 | 14 | 499 | 51 | 526 | 558 | 83 | 15 | 498 | 50 | 527 | 559 | 82 | 16 | 497 | 49 | 528 | 560 | 81 |
180 | 116 | 429 | 436 | 173 | 397 | 179 | 115 | 430 | 435 | 174 | 398 | 178 | 114 | 431 | 434 | 175 | 399 | 177 | 113 | 432 | 433 | 176 | 400 |
301 | 269 | 237 | 244 | 308 | 372 | 302 | 270 | 238 | 243 | 307 | 371 | 303 | 271 | 239 | 242 | 306 | 370 | 304 | 272 | 240 | 241 | 305 | 369 |
276 | 365 | 333 | 340 | 212 | 205 | 275 | 366 | 334 | 339 | 211 | 206 | 274 | 367 | 335 | 338 | 210 | 207 | 273 | 368 | 336 | 337 | 209 | 208 |
468 | 404 | 148 | 141 | 461 | 109 | 467 | 403 | 147 | 142 | 462 | 110 | 466 | 402 | 146 | 143 | 463 | 111 | 465 | 401 | 145 | 144 | 464 | 112 |
493 | 77 | 532 | 45 | 20 | 564 | 494 | 78 | 531 | 46 | 19 | 563 | 495 | 79 | 530 | 47 | 18 | 562 | 496 | 80 | 529 | 48 | 17 | 561 |
Each 1/4 row/column/diagonal gives 1/4 of the magic sum, the magic 24x24 square is 6x6
compact and the numbers are in sequence in the magic square, following the 6x6 sub-squares forwards and backwards starting top
left.
I have used composite method, proportional (1) to construct
8x8, 9x9, 12x12a, 12x12b, 15x15a, 15x15b, 16x16a, 16x16b, 18x18, 20x20a, 20x20b, 21x21a, 21x21b, 24x24a, 24x24b, 24x24c, 27x27a, 27x27b, 28x28a, 28x28b, 30x30a, 30x30b,32x32a, 32x32b and 32x32c