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 A073289 #6 Oct 15 2015 10:55:23 %S A073289 0,1,2,3,4,5,6,8,7,9,10,11,13,12,14,15,19,22,21,16,20,17,18,23,24,25, %T A073289 27,26,28,29,33,36,35,30,34,31,32,37,38,39,41,40,51,52,60,64,63,56,62, %U A073289 58,59,42,43,53,61,57,44,54,45,46,47,55,48,49,50,65,66,67,69,68,70,71 %N A073289 Permutation of natural numbers induced by the Catalan bijection gma073289! acting on the parenthesizations encoded by A014486. %H A073289 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073289 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073289 (Scheme function implementing this automorphism on list-structures:) %o A073289 (define (gmA073289! s) (cond ((pair? s) (gmA073289! (cdr s)) (gmA073287! s))) s) %Y A073289 Inverse permutation: A073288. Occurs for first time in A073200 as row 696. %Y A073289 The scheme function gma073287! referred to below given in A073287. %K A073289 nonn %O A073289 0,3 %A A073289 _Antti Karttunen_, Jun 25 2002