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 A073286 #6 Oct 17 2015 08:36:23 %S A073286 0,1,2,3,4,5,6,8,7,9,10,11,12,13,14,15,19,21,22,16,20,18,17,23,24,25, %T A073286 26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,51,52,56,58,59,60,62, %U A073286 63,64,42,43,53,57,61,47,55,49,50,44,54,48,46,45,65,66,67,68,69,70,71 %N A073286 Permutation of natural numbers induced by the composition of the Catalan bijections A069770 & A069767. %H A073286 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073286 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A073286 a(n) = A069770(A069767(n)). %Y A073286 Inverse permutation: A073287. Occurs for first time in A073200 as row 41. Counts of the fixed elements: A073268. %K A073286 nonn %O A073286 0,3 %A A073286 _Antti Karttunen_, Jun 25 2002