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 A125009 #2 Mar 31 2012 14:45:33 %S A125009 42,54,66,70,75,78,102,105,110,111,114,117,120,123,126,129,130,138, %T A125009 141,147,153,159,162,170,171,174,175,177,180,182,183,186,190,198,201, %U A125009 207,213,219,222,230,234,237,238,240,243,245,246,249,250,252,258,260,261 %N A125009 Numbers n for which nontrivial positive magic squares of exactly 2 different orders with magic sum n exist. For a definition of nontrivial positive magic squares, see A125005. %C A125009 A125009 lists all values s such that A125005(s) = 2. %Y A125009 Cf. A125005, A125006, A125007, A125008, A125010, A125011, A125012, A125013, A125014, A125015, A125016, A125017. %K A125009 easy,nonn %O A125009 1,1 %A A125009 _Jens Voß_, Nov 15 2006