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 A073198 #7 Oct 15 2015 10:57:13 %S A073198 0,1,2,3,4,6,7,5,8,9,14,16,11,19,17,18,10,12,15,20,13,21,22,23,37,42, %T A073198 30,51,44,47,28,25,39,53,33,56,60,45,46,48,49,50,26,29,24,31,40,38,43, %U A073198 32,52,54,55,27,34,41,57,35,58,59,61,36,62,63,64,65,107,121,70,149,126 %N A073198 Permutation of natural numbers induced by the Catalan bijection gmA073198 acting on the parenthesizations as ordered by A014486. %C A073198 Is there an equivalent Catalan bijection in A073200? %H A073198 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073198 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073198 (Scheme function implementing this automorphism on list-structures:) %o A073198 (define (gmA073198 s) (cond ((pair? s) (gmA072797! s) (gmA073198 (cdr s)) (gmA072796! s) (gmA073198 (cdr s)))) s) %Y A073198 Inverse permutation: A073199. The car/cdr-flipped conjugate of A073209, i.e. A073198(n) = A057163(A073209(A057163(n))). Cf. also A073194-A073197. %Y A073198 The scheme functions gma072796! and gma072797! referred to below are given in A072796 and A072797. %K A073198 nonn %O A073198 0,3 %A A073198 _Antti Karttunen_, Jun 25 2002