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 A096672 #4 Mar 30 2012 17:29:16 %S A096672 3,15,15,29,39,51,65,73,87,75,89,109,111,157,123,185,149,205,221,219, %T A096672 185,183,195,205,291,327,255,291,305,255,269,325,303,317,411,339,411, %U A096672 397,375,481,533,409,461,507,425,471,435,435,593,565,521,485,493,555 %N A096672 Smallest side of the first primitive d-arithmetic triangle, where d=A072330(n). %Y A096672 Cf. A072330, A072360, A086909, A089019, A089020, A096673, A096674. %K A096672 nonn %O A096672 1,1 %A A096672 _Ray Chandler_, Jul 03 2004