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 A082346 #6 Oct 15 2015 10:55:24 %S A082346 0,1,3,2,7,8,6,4,5,17,18,20,22,21,16,19,14,9,10,15,11,12,13,45,46,48, %T A082346 50,49,54,55,61,64,63,57,62,58,59,44,47,53,60,56,42,51,37,23,24,38,25, %U A082346 26,27,43,52,39,28,29,40,30,31,32,41,33,34,35,36,129,130,132,134,133 %N A082346 Permutation of natural numbers induced by the Catalan bijection gma082346 acting on the parenthesizations encoded by A014486/A063171. %H A082346 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A082346 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a> %o A082346 (Scheme functions implementing this automorphism on list-structures:) %o A082346 (define (gma082346! s) (cond ((pair? s) (gma082346! (cdr s)) (gma069768! s))) s) %Y A082346 Inverse of A082345. Occurs in A073200 as row 88. Cf. also A069768, A073288-A073289, A082347-A082348. %K A082346 nonn %O A082346 0,3 %A A082346 _Antti Karttunen_, Apr 17 2003