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 A082339 #7 Oct 15 2015 10:55:24 %S A082339 0,1,2,3,4,5,7,6,8,9,10,12,11,13,17,18,16,14,15,20,19,21,22,23,24,26, %T A082339 25,27,31,32,30,28,29,34,33,35,36,45,46,48,49,50,44,47,42,37,38,43,40, %U A082339 39,41,54,55,53,51,52,57,56,58,59,61,60,62,63,64,65,66,68,67,69 %N A082339 Permutation of natural numbers induced by the Catalan bijection gma082339 acting on the parenthesizations encoded by A014486/A063171. %H A082339 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A082339 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a> %o A082339 (Scheme functions implementing this automorphism on list-structures:) %o A082339 (define (gma082339! s) (cond ((pair? s) (gma072797! s) (gma082339! (cdr s)))) s) %Y A082339 Inverse of A082340. Occurs in A073200 as row 1796. Cf. also A072797, A082337-A082341. %Y A082339 Max. cycle size and LCMs of cycle sizes: A016116 (to be checked). (In range [A014137(n-1)..A014138(n-1)] of this permutation, possibly shifted one term left or right). %K A082339 nonn %O A082339 0,3 %A A082339 _Antti Karttunen_, Apr 17 2003