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 A073280 #6 Oct 17 2015 08:36:23 %S A073280 0,1,2,3,5,4,6,8,7,13,12,11,10,9,15,14,19,22,21,16,20,18,17,36,35,34, %T A073280 32,31,33,30,29,27,26,28,25,24,23,41,40,39,38,37,52,51,60,64,63,56,62, %U A073280 59,58,43,42,53,61,57,47,55,50,49,44,54,48,46,45,106,105,104,101,100 %N A073280 Self-inverse permutation of natural numbers induced by the composition of the Catalan bijections A069770 & A057163. %H A073280 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073280 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A073280 a(n) = A069770(A057163(n)) = A057163(A069770(n)). %Y A073280 Occurs for first time in A073200 as row 9. %K A073280 nonn %O A073280 0,3 %A A073280 _Antti Karttunen_, Jun 25 2002