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 A073283 #6 Oct 17 2015 08:36:23 %S A073283 0,1,3,2,8,6,7,5,4,22,21,19,15,14,20,16,18,13,12,17,11,10,9,64,63,62, %T A073283 59,58,60,56,52,41,40,51,39,38,37,61,57,53,43,42,55,47,50,36,35,49,34, %U A073283 32,31,54,44,48,33,30,46,29,27,26,45,28,25,24,23,196,195,194,190,189 %N A073283 Permutation of natural numbers induced by the composition of the Catalan bijections A057163 & A072796. %H A073283 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073283 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A073283 a(n) = A057163(A072796(n)) %Y A073283 Inverse permutation: A073282. Occurs for first time in A073200 as row 19. %K A073283 nonn %O A073283 0,3 %A A073283 _Antti Karttunen_, Jun 25 2002