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 A086434 #6 Mar 31 2012 14:02:19 %S A086434 0,1,2,4,3,5,6,10,12,11,7,13,9,8,14,15,16,18,17,28,29,33,35,34,30,36, %T A086434 32,31,19,20,37,39,38,24,41,26,25,21,40,27,23,22,42,43,44,46,45,47,48, %U A086434 52,54,53,49,55,51,50,84,85,86,88,87,98,99,103,105,104,100,106,102,101 %N A086434 Contraction-permutation of A085170: a(n) = A082853(A085170(A081291(n))). %H A086434 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (With the complete Scheme source) %H A086434 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a> %Y A086434 Inverse: A086433. %K A086434 nonn %O A086434 0,3 %A A086434 _Antti Karttunen_, Jun 23 2003