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 A072254 #5 Mar 31 2012 10:26:00
%S A072254 1,48,201,258,393,453,558,573,633,678,1623,2103
%N A072254 Numbers n such that triples generated by {2*(n-1),2*n,2*(n+1)} form A007534.
%K A072254 nonn
%O A072254 1,2
%A A072254 _Lekraj Beedassy_, Jul 08 2002