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 A212202 #9 Jun 12 2012 11:25:00 %S A212202 1,2,4,16,18,256,258,65536,65540 %N A212202 Where records in A212200 occur. %Y A212202 Cf. A212200, A212201, A212203, A212204, A051775. %K A212202 nonn,more %O A212202 1,2 %A A212202 _N. J. A. Sloane_, May 03 2012 %E A212202 a(7)-a(9) from Alex Ryba, Jun 10 2012