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 A102772 #4 Mar 30 2012 16:50:10 %S A102772 1,3,5,10,22,36 %N A102772 Numbers n such that binomial(n,3) is in A027568. %Y A102772 Cf. A027568. %K A102772 nonn,fini,full %O A102772 1,2 %A A102772 _N. J. A. Sloane_, Sep 06 2008