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 A064359 #2 Oct 12 2013 15:16:36 %S A064359 1,2,5,3,7,11,23,4,9,14,29,19,39 %N A064359 Inverse of sequence A052331 considered as a permutation of the natural numbers. %C A064359 Sequence A052331 claims to be the "inverse" of A052330. %Y A064359 Cf. A052330, A052331. %K A064359 nonn %O A064359 1,2 %A A064359 _Howard A. Landman_, Sep 25 2001