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 A082340 #7 Oct 15 2015 10:55:24 %S A082340 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 A082340 25,27,31,32,30,28,29,34,33,35,36,45,46,49,48,50,44,47,42,37,38,43,39, %U A082340 40,41,54,55,53,51,52,57,56,58,59,61,60,62,63,64,65,66,68,67,69 %N A082340 Permutation of natural numbers induced by the Catalan bijection gma082340 acting on the parenthesizations encoded by A014486/A063171. %H A082340 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A082340 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a> %o A082340 (Scheme functions implementing this automorphism on list-structures:) %o A082340 (define (gma082340! s) (cond ((pair? s) (gma082340! (cdr s)) (gma072797! s))) s) %Y A082340 Inverse of A082339. Occurs in A073200 as row 1798. Cf. also A072797, A082337-A082341. %Y A082340 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 A082340 nonn %O A082340 0,3 %A A082340 _Antti Karttunen_, Apr 17 2003