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 A073288 #6 Oct 15 2015 10:55:23 %S A073288 0,1,2,3,4,5,6,8,7,9,10,11,13,12,14,15,19,21,22,16,20,18,17,23,24,25, %T A073288 27,26,28,29,33,35,36,30,34,32,31,37,38,39,41,40,51,52,56,58,59,60,62, %U A073288 63,64,42,43,53,57,61,47,55,49,50,44,54,48,46,45,65,66,67,69,68,70,71 %N A073288 Permutation of natural numbers induced by the Catalan bijection gma073288! acting on the parenthesizations encoded by A014486. %H A073288 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073288 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073288 (Scheme function implementing this automorphism on list-structures:) %o A073288 (define (gmA073288! s) (cond ((pair? s) (gmA073286! s) (gmA073288! (cdr s)))) s) %Y A073288 Inverse permutation: A073289. Occurs for first time in A073200 as row 416. %Y A073288 The scheme function gma073286! referred to below given in A073286. %K A073288 nonn %O A073288 0,3 %A A073288 _Antti Karttunen_, Jun 25 2002