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 A174092 #4 Feb 02 2021 22:15:49 %S A174092 -83,-53,-23,7,37,67,97,127,157 %N A174092 Primes p = -83 + n * 30 (n = 0, 1, ..., 8) forming "optimal" 3 x 3 Magic Prime Square. %C A174092 1st row: -53 157 7 %C A174092 2nd row: 97 37 -23 %C A174092 3rd row: 67 -83 127 %C A174092 Magic 3 x 3 square with minimal magic constant M = 3 * 37 = 111. %C A174092 Elements are in arithmetic 1st-order progression, negative p are primes. %C A174092 This magic prime square (MPS) from the author dates from 2008. %C A174092 Note that Dudeney's MPS from 1917 has the nonprime element 1: %C A174092 67 1 43 %C A174092 13 37 61 %C A174092 31 73 7 %C A174092 Madachy/Ondrejka gave 1979 MPS with M = 3 * 59 = 177 > 111: %C A174092 17 89 71 %C A174092 113 59 5 %C A174092 47 29 101 %D A174092 E. Dudeney: Amusements in Mathematics, Problem 408, New York: Dover, 1970. %D A174092 J. S. Madachy: Magic and Antimagic Squares, Madachy's Mathematical Recreations, New York, pp. 85-113, New York: Dover, 1979. %D A174092 M. Miller: Geloeste und ungeloeste mathematische Probleme, Leipzig, 1982. %Y A174092 Cf. A024351, A073519. %K A174092 base,fini,uned,sign %O A174092 1,1 %A A174092 Ulrich Krug (leuchtfeuer37(AT)gmx.de), Mar 07 2010