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 A073205 #7 Oct 15 2015 10:57:13 %S A073205 0,1,2,3,4,7,5,6,8,9,12,17,16,18,10,21,11,14,15,13,19,20,22,23,26,31, %T A073205 30,32,45,57,44,42,43,46,47,48,50,24,35,49,56,63,25,58,28,37,38,29,39, %U A073205 40,41,27,59,33,51,52,34,53,54,55,36,60,61,62,64,65,68,73,72,74,87,99 %N A073205 Permutation of natural numbers induced by the Catalan bijection gmA073205 acting on the parenthesizations as ordered by A014486. %C A073205 Is there an equivalent Catalan bijection in A073200? %H A073205 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073205 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073205 (Scheme function implementing this automorphism on list-structures:) %o A073205 (define (gmA073205 s) (cond ((pair? s) (gmA072796! s) (gmA073205 (cdr s)) (gmA072797! s) (gmA073205 (car s)))) s) %Y A073205 Inverse permutation: A073206. The car/cdr-flipped conjugate of A073194, i.e. A073205(n) = A057163(A073194(A057163(n))). Cf. also A073207-A073210. %Y A073205 The scheme functions gma072796! and gma072797! referred to below are given in A072796 and A072797. %K A073205 nonn %O A073205 0,3 %A A073205 _Antti Karttunen_, Jun 25 2002