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 A085164 #7 Mar 31 2012 14:02:19 %S A085164 0,1,2,3,4,7,5,6,8,9,17,10,16,21,11,20,12,14,18,13,15,19,22,23,45,24, %T A085164 44,58,25,54,26,42,49,27,43,56,63,28,48,29,53,62,30,57,31,37,46,35,38, %U A085164 47,59,33,61,34,39,55,32,40,51,50,36,41,52,60,64,65,129,66,128,170 %N A085164 Inverse permutation to A085163. %H A085164 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (With the complete Scheme source) %H A085164 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a> %Y A085164 Inverse: A085163. a(n) = A057508(A085161(n)). Occurs in A073200. Cf. also A085171, A085172. %Y A085164 Number of fixed points: A051920. See comment at A085163. %K A085164 nonn %O A085164 0,3 %A A085164 _Antti Karttunen_, Jun 23 2003