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 A073208 #7 Oct 15 2015 10:57:13 %S A073208 0,1,2,3,4,6,7,5,8,9,16,10,14,19,17,18,12,11,15,20,13,21,22,23,26,42, %T A073208 44,53,25,38,37,24,47,27,51,56,60,45,48,49,46,50,31,32,30,28,39,40,43, %U A073208 29,52,54,55,34,33,41,57,35,58,59,61,36,62,63,64,65,126,73,72,76,121 %N A073208 Permutation of natural numbers induced by the Catalan bijection gmA073208 acting on the parenthesizations as ordered by A014486. %C A073208 Is there an equivalent Catalan bijection in A073200? %H A073208 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073208 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073208 (Scheme function implementing this automorphism on list-structures:) %o A073208 (define (gmA073208 s) (cond ((pair? s) (gmA073208 (cdr s)) (gmA072797! s) (gmA073208 (cdr s)) (gmA072796! s))) s) %Y A073208 Inverse permutation: A073207. The car/cdr-flipped conjugate of A073197, i.e. A073208(n) = A057163(A073197(A057163(n))). Cf. also A073205-A073210. %Y A073208 The scheme functions gma072796! and gma072797! referred to below are given in A072796 and A072797. %K A073208 nonn %O A073208 0,3 %A A073208 _Antti Karttunen_, Jun 25 2002