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 A125519 #4 May 29 2025 22:08:51 %S A125519 831,326,267,574,584,257,316,841,158,683,742,415,425,732,673,168 %N A125519 A 4 X 4 permutation-free magic square with magic sum 1998. %C A125519 The magic sum is 1998. For additional details see the paper by Hossin Behforooz. %D A125519 Hossin Behforooz, "Permutation-free magic squares", J. Recreational Mathematics, vol. 33, (2004-2005), pp. 103-106. See Figure 2 on page 104. %e A125519 The magic square is: %e A125519 831, 326, 267, 574 %e A125519 584, 257, 316, 841 %e A125519 158, 683, 742, 415 %e A125519 425, 732, 673, 168 %Y A125519 Cf. A080992. %K A125519 fini,nonn,tabf,full %O A125519 1,1 %A A125519 _Parthasarathy Nambi_, Jan 22 2007