A concentric magic square is nice. A concentric magic square with diamond is even better; see i.e. the 15x15 Al Antaakii concentric magic square with diamond. In the diamond are alle odd numbers (and outside the diamond are the even numbers).
How to construct a concentric magic square with diamond? Puzzle in EXCEL and see the result below:
29x29 concentric magic square with diamond
292 |
544 |
542 |
540 |
538 |
306 |
534 |
310 |
530 |
314 |
526 |
318 |
522 |
322 |
1 |
518 |
326 |
514 |
330 |
510 |
334 |
494 |
338 |
502 |
342 |
344 |
496 |
476 |
546 |
352 |
202 |
206 |
634 |
210 |
630 |
214 |
626 |
218 |
622 |
222 |
618 |
226 |
163 |
707 |
195 |
614 |
230 |
610 |
234 |
606 |
238 |
602 |
242 |
598 |
594 |
468 |
638 |
490 |
356 |
592 |
130 |
134 |
706 |
138 |
702 |
142 |
698 |
146 |
694 |
150 |
5 |
835 |
9 |
831 |
13 |
690 |
154 |
686 |
158 |
682 |
162 |
678 |
676 |
596 |
710 |
250 |
486 |
482 |
252 |
674 |
74 |
78 |
762 |
82 |
758 |
86 |
754 |
90 |
25 |
815 |
29 |
811 |
33 |
807 |
37 |
750 |
94 |
746 |
98 |
742 |
740 |
506 |
766 |
168 |
590 |
360 |
362 |
588 |
170 |
738 |
34 |
38 |
802 |
42 |
798 |
46 |
53 |
787 |
57 |
783 |
61 |
779 |
65 |
775 |
69 |
794 |
50 |
790 |
788 |
424 |
806 |
104 |
672 |
254 |
480 |
478 |
256 |
670 |
736 |
786 |
10 |
14 |
826 |
18 |
89 |
751 |
93 |
747 |
97 |
743 |
101 |
739 |
105 |
735 |
109 |
822 |
820 |
350 |
830 |
56 |
106 |
172 |
586 |
364 |
368 |
584 |
174 |
734 |
784 |
818 |
2 |
836 |
137 |
141 |
145 |
149 |
153 |
157 |
165 |
673 |
669 |
665 |
661 |
657 |
653 |
456 |
838 |
24 |
58 |
108 |
668 |
258 |
474 |
472 |
260 |
666 |
110 |
782 |
816 |
834 |
223 |
643 |
639 |
635 |
631 |
627 |
623 |
621 |
231 |
235 |
239 |
243 |
247 |
251 |
227 |
8 |
26 |
60 |
732 |
176 |
582 |
370 |
372 |
580 |
178 |
730 |
62 |
814 |
703 |
197 |
279 |
299 |
295 |
291 |
287 |
283 |
569 |
571 |
575 |
579 |
583 |
587 |
275 |
645 |
139 |
28 |
780 |
112 |
664 |
262 |
470 |
466 |
264 |
662 |
114 |
778 |
111 |
699 |
201 |
589 |
519 |
505 |
509 |
513 |
517 |
521 |
313 |
309 |
305 |
301 |
319 |
253 |
641 |
143 |
731 |
64 |
728 |
180 |
578 |
376 |
378 |
576 |
182 |
726 |
71 |
729 |
695 |
205 |
585 |
303 |
359 |
501 |
497 |
493 |
357 |
361 |
365 |
369 |
487 |
539 |
257 |
637 |
147 |
113 |
771 |
116 |
660 |
266 |
464 |
462 |
268 |
658 |
39 |
769 |
115 |
691 |
209 |
581 |
307 |
371 |
383 |
373 |
377 |
457 |
453 |
449 |
455 |
471 |
535 |
261 |
633 |
151 |
727 |
73 |
803 |
184 |
574 |
380 |
382 |
572 |
827 |
801 |
75 |
725 |
687 |
213 |
577 |
311 |
367 |
467 |
439 |
431 |
401 |
399 |
435 |
375 |
475 |
531 |
265 |
629 |
155 |
117 |
767 |
41 |
15 |
270 |
460 |
384 |
675 |
825 |
43 |
765 |
119 |
683 |
217 |
573 |
315 |
363 |
463 |
409 |
415 |
429 |
419 |
433 |
379 |
479 |
527 |
269 |
625 |
159 |
723 |
77 |
799 |
17 |
167 |
458 |
839 |
709 |
19 |
797 |
79 |
721 |
681 |
617 |
277 |
317 |
489 |
461 |
405 |
425 |
421 |
417 |
437 |
381 |
353 |
525 |
565 |
225 |
161 |
121 |
763 |
45 |
823 |
133 |
3 |
388 |
193 |
821 |
47 |
761 |
123 |
171 |
613 |
281 |
515 |
491 |
391 |
445 |
423 |
413 |
427 |
397 |
451 |
351 |
327 |
561 |
229 |
671 |
719 |
81 |
795 |
21 |
649 |
454 |
446 |
272 |
23 |
793 |
83 |
717 |
175 |
609 |
285 |
511 |
495 |
395 |
407 |
411 |
441 |
443 |
403 |
447 |
347 |
331 |
557 |
233 |
667 |
125 |
759 |
49 |
819 |
570 |
396 |
398 |
568 |
186 |
51 |
757 |
127 |
179 |
605 |
289 |
507 |
499 |
387 |
469 |
465 |
385 |
389 |
393 |
459 |
343 |
335 |
553 |
237 |
663 |
715 |
85 |
791 |
656 |
274 |
444 |
442 |
276 |
654 |
118 |
87 |
713 |
183 |
601 |
293 |
503 |
355 |
341 |
345 |
349 |
485 |
481 |
477 |
473 |
483 |
339 |
549 |
241 |
659 |
129 |
755 |
724 |
188 |
566 |
400 |
402 |
564 |
190 |
722 |
66 |
131 |
187 |
597 |
297 |
523 |
337 |
333 |
329 |
325 |
321 |
529 |
533 |
537 |
541 |
323 |
545 |
245 |
655 |
711 |
776 |
120 |
652 |
278 |
440 |
438 |
280 |
650 |
122 |
774 |
30 |
191 |
593 |
567 |
543 |
547 |
551 |
555 |
559 |
273 |
271 |
267 |
263 |
259 |
255 |
563 |
249 |
651 |
812 |
68 |
720 |
192 |
562 |
404 |
406 |
560 |
194 |
718 |
70 |
810 |
392 |
615 |
199 |
203 |
207 |
211 |
215 |
219 |
221 |
611 |
607 |
603 |
599 |
595 |
591 |
619 |
450 |
32 |
772 |
124 |
648 |
282 |
436 |
434 |
284 |
646 |
126 |
770 |
358 |
4 |
6 |
705 |
701 |
697 |
693 |
689 |
685 |
677 |
169 |
173 |
177 |
181 |
185 |
189 |
386 |
840 |
484 |
72 |
716 |
196 |
558 |
408 |
432 |
556 |
198 |
714 |
452 |
12 |
828 |
16 |
824 |
753 |
91 |
749 |
95 |
745 |
99 |
741 |
103 |
737 |
107 |
733 |
20 |
22 |
492 |
832 |
390 |
128 |
644 |
286 |
410 |
430 |
290 |
354 |
554 |
36 |
804 |
40 |
800 |
44 |
796 |
789 |
55 |
785 |
59 |
781 |
63 |
777 |
67 |
773 |
48 |
792 |
52 |
54 |
418 |
808 |
288 |
488 |
552 |
412 |
414 |
548 |
642 |
76 |
764 |
80 |
760 |
84 |
756 |
88 |
752 |
817 |
27 |
813 |
31 |
809 |
35 |
805 |
92 |
748 |
96 |
744 |
100 |
102 |
336 |
768 |
200 |
294 |
428 |
416 |
394 |
132 |
708 |
136 |
704 |
140 |
700 |
144 |
696 |
148 |
692 |
837 |
7 |
833 |
11 |
829 |
152 |
688 |
156 |
684 |
160 |
680 |
164 |
166 |
246 |
712 |
448 |
426 |
422 |
204 |
636 |
208 |
632 |
212 |
628 |
216 |
624 |
220 |
620 |
224 |
616 |
679 |
135 |
647 |
228 |
612 |
232 |
608 |
236 |
604 |
240 |
600 |
244 |
248 |
374 |
640 |
420 |
296 |
298 |
300 |
302 |
304 |
536 |
308 |
532 |
312 |
528 |
316 |
524 |
320 |
520 |
841 |
324 |
516 |
328 |
512 |
332 |
508 |
348 |
504 |
340 |
500 |
498 |
346 |
366 |
550 |
Puzzle yourself using the EXCEL download below.