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 A125010 #2 Mar 31 2012 14:45:33 %S A125010 90,135,150,165,189,195,225,231,255,270,273,285,294,300,330,345,350, %T A125010 357,369,375,387,390,396,399,414,423,435,459,462,465,468,477,483,486, %U A125010 490,504,510,513,522,531,546,549,558,570,588,594,595,603,609,612,621,639 %N A125010 Numbers n for which nontrivial positive magic squares of exactly 3 different orders with magic sum n exist. For a definition of nontrivial positive magic squares, see A125005. %C A125010 A125010 lists all values s such that A125005(s) = 3. %Y A125010 Cf. A125005, A125006, A125007, A125008, A125009, A125011, A125012, A125013, A125014, A125015, A125016, A125017. %K A125010 easy,nonn %O A125010 1,1 %A A125010 _Jens Voß_, Nov 15 2006