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 A126649 #10 Jul 12 2018 11:41:34 %S A126649 71,1,51,32,50,21,41,61,56,26,31,81,11,20,62,34,40,60,43,28,48,42,22, %T A126649 54,39 %N A126649 A 5 x 5 magic square. %C A126649 The magic sum is 205. See Figure C.4 in Appendix C in Maya Ahmed's PhD thesis. %H A126649 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 A126649 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 A126649 The magic square is: %e A126649 71 1 51 32 50 %e A126649 21 41 61 56 26 %e A126649 31 81 11 20 62 %e A126649 34 40 60 43 28 %e A126649 48 42 22 54 39 %K A126649 fini,full,nonn,tabf %O A126649 1,1 %A A126649 _Parthasarathy Nambi_, Feb 08 2007