Use 2x the same or 2 different ulta magic 5x5 squares to produce a panmagic and symmetric 25x25 square.
Take 1x number from the first grid with 5x5 the same ultra magic 5x5 square and take 25 [number -/- 1] of the same cell from the second grid with the '5x5 blown up' ultra magic 5x5 square.
1x number
1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 |
23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 |
10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 |
14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 |
17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 |
1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 |
23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 |
10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 |
14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 |
17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 |
1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 |
23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 |
10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 |
14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 |
17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 |
1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 |
23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 |
10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 |
14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 |
17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 |
1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 | 1 | 15 | 22 | 18 | 9 |
23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 | 23 | 19 | 6 | 5 | 12 |
10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 | 10 | 2 | 13 | 24 | 16 |
14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 | 14 | 21 | 20 | 7 | 3 |
17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 | 17 | 8 | 4 | 11 | 25 |
+ 25x [number -/- 1]
1 | 1 | 1 | 1 | 1 | 15 | 15 | 15 | 15 | 15 | 22 | 22 | 22 | 22 | 22 | 18 | 18 | 18 | 18 | 18 | 9 | 9 | 9 | 9 | 9 |
1 | 1 | 1 | 1 | 1 | 15 | 15 | 15 | 15 | 15 | 22 | 22 | 22 | 22 | 22 | 18 | 18 | 18 | 18 | 18 | 9 | 9 | 9 | 9 | 9 |
1 | 1 | 1 | 1 | 1 | 15 | 15 | 15 | 15 | 15 | 22 | 22 | 22 | 22 | 22 | 18 | 18 | 18 | 18 | 18 | 9 | 9 | 9 | 9 | 9 |
1 | 1 | 1 | 1 | 1 | 15 | 15 | 15 | 15 | 15 | 22 | 22 | 22 | 22 | 22 | 18 | 18 | 18 | 18 | 18 | 9 | 9 | 9 | 9 | 9 |
1 | 1 | 1 | 1 | 1 | 15 | 15 | 15 | 15 | 15 | 22 | 22 | 22 | 22 | 22 | 18 | 18 | 18 | 18 | 18 | 9 | 9 | 9 | 9 | 9 |
23 | 23 | 23 | 23 | 23 | 19 | 19 | 19 | 19 | 19 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 12 | 12 | 12 | 12 | 12 |
23 | 23 | 23 | 23 | 23 | 19 | 19 | 19 | 19 | 19 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 12 | 12 | 12 | 12 | 12 |
23 | 23 | 23 | 23 | 23 | 19 | 19 | 19 | 19 | 19 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 12 | 12 | 12 | 12 | 12 |
23 | 23 | 23 | 23 | 23 | 19 | 19 | 19 | 19 | 19 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 12 | 12 | 12 | 12 | 12 |
23 | 23 | 23 | 23 | 23 | 19 | 19 | 19 | 19 | 19 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 12 | 12 | 12 | 12 | 12 |
10 | 10 | 10 | 10 | 10 | 2 | 2 | 2 | 2 | 2 | 13 | 13 | 13 | 13 | 13 | 24 | 24 | 24 | 24 | 24 | 16 | 16 | 16 | 16 | 16 |
10 | 10 | 10 | 10 | 10 | 2 | 2 | 2 | 2 | 2 | 13 | 13 | 13 | 13 | 13 | 24 | 24 | 24 | 24 | 24 | 16 | 16 | 16 | 16 | 16 |
10 | 10 | 10 | 10 | 10 | 2 | 2 | 2 | 2 | 2 | 13 | 13 | 13 | 13 | 13 | 24 | 24 | 24 | 24 | 24 | 16 | 16 | 16 | 16 | 16 |
10 | 10 | 10 | 10 | 10 | 2 | 2 | 2 | 2 | 2 | 13 | 13 | 13 | 13 | 13 | 24 | 24 | 24 | 24 | 24 | 16 | 16 | 16 | 16 | 16 |
10 | 10 | 10 | 10 | 10 | 2 | 2 | 2 | 2 | 2 | 13 | 13 | 13 | 13 | 13 | 24 | 24 | 24 | 24 | 24 | 16 | 16 | 16 | 16 | 16 |
14 | 14 | 14 | 14 | 14 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 7 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 3 | 3 |
14 | 14 | 14 | 14 | 14 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 7 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 3 | 3 |
14 | 14 | 14 | 14 | 14 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 7 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 3 | 3 |
14 | 14 | 14 | 14 | 14 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 7 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 3 | 3 |
14 | 14 | 14 | 14 | 14 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 7 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 3 | 3 |
17 | 17 | 17 | 17 | 17 | 8 | 8 | 8 | 8 | 8 | 4 | 4 | 4 | 4 | 4 | 11 | 11 | 11 | 11 | 11 | 25 | 25 | 25 | 25 | 25 |
17 | 17 | 17 | 17 | 17 | 8 | 8 | 8 | 8 | 8 | 4 | 4 | 4 | 4 | 4 | 11 | 11 | 11 | 11 | 11 | 25 | 25 | 25 | 25 | 25 |
17 | 17 | 17 | 17 | 17 | 8 | 8 | 8 | 8 | 8 | 4 | 4 | 4 | 4 | 4 | 11 | 11 | 11 | 11 | 11 | 25 | 25 | 25 | 25 | 25 |
17 | 17 | 17 | 17 | 17 | 8 | 8 | 8 | 8 | 8 | 4 | 4 | 4 | 4 | 4 | 11 | 11 | 11 | 11 | 11 | 25 | 25 | 25 | 25 | 25 |
17 | 17 | 17 | 17 | 17 | 8 | 8 | 8 | 8 | 8 | 4 | 4 | 4 | 4 | 4 | 11 | 11 | 11 | 11 | 11 | 25 | 25 | 25 | 25 | 25 |
= panmagic en symmetric 25x25 square
1 | 15 | 22 | 18 | 9 | 351 | 365 | 372 | 368 | 359 | 526 | 540 | 547 | 543 | 534 | 426 | 440 | 447 | 443 | 434 | 201 | 215 | 222 | 218 | 209 |
23 | 19 | 6 | 5 | 12 | 373 | 369 | 356 | 355 | 362 | 548 | 544 | 531 | 530 | 537 | 448 | 444 | 431 | 430 | 437 | 223 | 219 | 206 | 205 | 212 |
10 | 2 | 13 | 24 | 16 | 360 | 352 | 363 | 374 | 366 | 535 | 527 | 538 | 549 | 541 | 435 | 427 | 438 | 449 | 441 | 210 | 202 | 213 | 224 | 216 |
14 | 21 | 20 | 7 | 3 | 364 | 371 | 370 | 357 | 353 | 539 | 546 | 545 | 532 | 528 | 439 | 446 | 445 | 432 | 428 | 214 | 221 | 220 | 207 | 203 |
17 | 8 | 4 | 11 | 25 | 367 | 358 | 354 | 361 | 375 | 542 | 533 | 529 | 536 | 550 | 442 | 433 | 429 | 436 | 450 | 217 | 208 | 204 | 211 | 225 |
551 | 565 | 572 | 568 | 559 | 451 | 465 | 472 | 468 | 459 | 126 | 140 | 147 | 143 | 134 | 101 | 115 | 122 | 118 | 109 | 276 | 290 | 297 | 293 | 284 |
573 | 569 | 556 | 555 | 562 | 473 | 469 | 456 | 455 | 462 | 148 | 144 | 131 | 130 | 137 | 123 | 119 | 106 | 105 | 112 | 298 | 294 | 281 | 280 | 287 |
560 | 552 | 563 | 574 | 566 | 460 | 452 | 463 | 474 | 466 | 135 | 127 | 138 | 149 | 141 | 110 | 102 | 113 | 124 | 116 | 285 | 277 | 288 | 299 | 291 |
564 | 571 | 570 | 557 | 553 | 464 | 471 | 470 | 457 | 453 | 139 | 146 | 145 | 132 | 128 | 114 | 121 | 120 | 107 | 103 | 289 | 296 | 295 | 282 | 278 |
567 | 558 | 554 | 561 | 575 | 467 | 458 | 454 | 461 | 475 | 142 | 133 | 129 | 136 | 150 | 117 | 108 | 104 | 111 | 125 | 292 | 283 | 279 | 286 | 300 |
226 | 240 | 247 | 243 | 234 | 26 | 40 | 47 | 43 | 34 | 301 | 315 | 322 | 318 | 309 | 576 | 590 | 597 | 593 | 584 | 376 | 390 | 397 | 393 | 384 |
248 | 244 | 231 | 230 | 237 | 48 | 44 | 31 | 30 | 37 | 323 | 319 | 306 | 305 | 312 | 598 | 594 | 581 | 580 | 587 | 398 | 394 | 381 | 380 | 387 |
235 | 227 | 238 | 249 | 241 | 35 | 27 | 38 | 49 | 41 | 310 | 302 | 313 | 324 | 316 | 585 | 577 | 588 | 599 | 591 | 385 | 377 | 388 | 399 | 391 |
239 | 246 | 245 | 232 | 228 | 39 | 46 | 45 | 32 | 28 | 314 | 321 | 320 | 307 | 303 | 589 | 596 | 595 | 582 | 578 | 389 | 396 | 395 | 382 | 378 |
242 | 233 | 229 | 236 | 250 | 42 | 33 | 29 | 36 | 50 | 317 | 308 | 304 | 311 | 325 | 592 | 583 | 579 | 586 | 600 | 392 | 383 | 379 | 386 | 400 |
326 | 340 | 347 | 343 | 334 | 501 | 515 | 522 | 518 | 509 | 476 | 490 | 497 | 493 | 484 | 151 | 165 | 172 | 168 | 159 | 51 | 65 | 72 | 68 | 59 |
348 | 344 | 331 | 330 | 337 | 523 | 519 | 506 | 505 | 512 | 498 | 494 | 481 | 480 | 487 | 173 | 169 | 156 | 155 | 162 | 73 | 69 | 56 | 55 | 62 |
335 | 327 | 338 | 349 | 341 | 510 | 502 | 513 | 524 | 516 | 485 | 477 | 488 | 499 | 491 | 160 | 152 | 163 | 174 | 166 | 60 | 52 | 63 | 74 | 66 |
339 | 346 | 345 | 332 | 328 | 514 | 521 | 520 | 507 | 503 | 489 | 496 | 495 | 482 | 478 | 164 | 171 | 170 | 157 | 153 | 64 | 71 | 70 | 57 | 53 |
342 | 333 | 329 | 336 | 350 | 517 | 508 | 504 | 511 | 525 | 492 | 483 | 479 | 486 | 500 | 167 | 158 | 154 | 161 | 175 | 67 | 58 | 54 | 61 | 75 |
401 | 415 | 422 | 418 | 409 | 176 | 190 | 197 | 193 | 184 | 76 | 90 | 97 | 93 | 84 | 251 | 265 | 272 | 268 | 259 | 601 | 615 | 622 | 618 | 609 |
423 | 419 | 406 | 405 | 412 | 198 | 194 | 181 | 180 | 187 | 98 | 94 | 81 | 80 | 87 | 273 | 269 | 256 | 255 | 262 | 623 | 619 | 606 | 605 | 612 |
410 | 402 | 413 | 424 | 416 | 185 | 177 | 188 | 199 | 191 | 85 | 77 | 88 | 99 | 91 | 260 | 252 | 263 | 274 | 266 | 610 | 602 | 613 | 624 | 616 |
414 | 421 | 420 | 407 | 403 | 189 | 196 | 195 | 182 | 178 | 89 | 96 | 95 | 82 | 78 | 264 | 271 | 270 | 257 | 253 | 614 | 621 | 620 | 607 | 603 |
417 | 408 | 404 | 411 | 425 | 192 | 183 | 179 | 186 | 200 | 92 | 83 | 79 | 86 | 100 | 267 | 258 | 254 | 261 | 275 | 617 | 608 | 604 | 611 | 625 |
I have used method composite, simple to construct
9x9, 12x12, 15x15a, 15x15b, 18x18, 20x20, 21x21a, 21x21b, 24x24a, 24x24b, 25x25, 27x27a, 27x27b, 28x28, 30x30a, 30x30b