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 A269325 #19 Mar 12 2016 22:22:13 %S A269325 199,409,3499,2063,6043,10859,433,3823,10861,4721,1699,15607,11927, %T A269325 3413,17,19141,12547,137,23509,7151,4091,24677,6553,937,31333,521, %U A269325 13469,34913,25073,37013,20599,6949,6143,30427,4673,45767,52879,35257,53299,9619,2141 %N A269325 a(n) = initial term of an arithmetic progression of nine primes used to form a 3 X 3 magic square with magic sum A269324(n). %D A269325 Joseph S. Madachy, "Magic and Antimagic Squares." Ch. 4 in Madachy's Mathematical Recreations, New York: Dover, 1979, p. 95. %H A269325 Wikipedia, <a href="http://en.wikipedia.org/wiki/Magic_square">Magic square</a> %H A269325 Wikipedia, <a href="https://en.wikipedia.org/wiki/Primes_in_arithmetic_progression">Primes in arithmetic progression</a> %H A269325 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a> %H A269325 <a href="/index/Pri#primes_AP">Index entries for sequences related to primes in arithmetic progressions</a> %Y A269325 Cf. A269324. Supersequence of A227284. %K A269325 nonn %O A269325 1,1 %A A269325 _Arkadiusz Wesolowski_, Feb 23 2016