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 A073199 #7 Oct 15 2015 10:57:13 %S A073199 0,1,2,3,4,7,5,6,8,9,16,12,17,20,10,18,11,14,15,13,19,21,22,23,44,31, %T A073199 42,53,30,43,26,45,49,34,54,57,61,24,47,32,46,55,25,48,28,37,38,29,39, %U A073199 40,41,27,50,33,51,52,35,56,58,59,36,60,62,63,64,65,126,87,128,156,68 %N A073199 Permutation of natural numbers induced by the Catalan bijection gmA073199 acting on the parenthesizations as ordered by A014486. %C A073199 Is there an equivalent Catalan bijection in A073200? %H A073199 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073199 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073199 (Scheme function implementing this automorphism on list-structures:) %o A073199 (define (gmA073199 s) (cond ((pair? s) (gmA073199 (cdr s)) (gmA072796! s) (gmA073199 (cdr s)) (gmA072797! s))) s) %Y A073199 Inverse permutation: A073198. The car/cdr-flipped conjugate of A073210, i.e. A073199(n) = A057163(A073210(A057163(n))). Cf. also A073194-A073197. %Y A073199 The scheme functions gma072796! and gma072797! referred to below are given in A072796 and A072797. %K A073199 nonn %O A073199 0,3 %A A073199 _Antti Karttunen_, Jun 25 2002