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 A073206 #7 Oct 15 2015 10:57:13 %S A073206 0,1,2,3,4,6,7,5,8,9,14,16,10,19,17,18,12,11,13,20,21,15,22,23,37,42, %T A073206 24,51,44,47,26,25,27,53,56,38,60,45,46,48,49,50,31,32,30,28,33,34,35, %U A073206 39,36,54,55,57,58,59,40,29,43,52,61,62,63,41,64,65,107,121,66,149,126 %N A073206 Permutation of natural numbers induced by the Catalan bijection gmA073206 acting on the parenthesizations as ordered by A014486. %C A073206 Is there an equivalent Catalan bijection in A073200? %H A073206 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073206 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073206 (Scheme function implementing this automorphism on list-structures:) %o A073206 (define (gmA073206 s) (cond ((pair? s) (gmA073206 (car s)) (gmA072797! s) (gmA073206 (cdr s)) (gmA072796! s))) s) %Y A073206 Inverse permutation: A073205. The car/cdr-flipped conjugate of A073195, i.e. A073206(n) = A057163(A073195(A057163(n))). Cf. also A073207-A073210. %Y A073206 The scheme functions gma072796! and gma072797! referred to below are given in A072796 and A072797. %K A073206 nonn %O A073206 0,3 %A A073206 _Antti Karttunen_, Jun 25 2002