This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A126651 #12 May 12 2023 15:36:35 %S A126651 71,1,51,32,50,2,80,21,41,61,56,26,13,69,31,81,11,20,62,65,17,34,40, %T A126651 60,43,28,64,18,48,42,22,54,39,75,7,33,53,15,68,16,44,58,49,29,67,14, %U A126651 66,24,38 %N A126651 A 7 X 7 magic square. %C A126651 The magic sum is 287. See Figure C.4 in Appendix C in Maya Ahmed's PhD thesis. %H A126651 Maya Mohsin Ahmed, <a href="https://arxiv.org/abs/math/0405476">Algebraic Combinatorics of Magic Squares</a>, arXiv:math/0405476 [math.CO], 2004. PhD thesis. %H A126651 Maya Mohsin Ahmed, <a href="https://www.jstor.org/stable/4145267">How many squares are there, Mr. Franklin?: Constructing and Enumerating Franklin Squares</a>, Amer. Math. Monthly, Vol. 111, 2004, pp. 394-410. %e A126651 The magic square is: %e A126651 71 1 51 32 50 2 80 %e A126651 21 41 61 56 26 13 69 %e A126651 31 81 11 20 62 65 17 %e A126651 34 40 60 43 28 64 18 %e A126651 48 42 22 54 39 75 7 %e A126651 33 53 15 68 16 44 58 %e A126651 49 29 67 14 66 24 38 %K A126651 fini,full,nonn,tabf %O A126651 1,1 %A A126651 _Parthasarathy Nambi_, Feb 08 2007