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 A073194 #7 Oct 15 2015 10:57:13 %S A073194 0,1,2,3,4,6,7,5,8,9,11,14,16,19,17,20,10,12,15,21,13,18,22,23,25,28, %T A073194 30,33,37,39,42,44,47,51,53,56,60,45,48,54,57,61,26,27,24,31,34,38,40, %U A073194 43,52,58,62,32,35,41,46,29,49,55,63,36,50,59,64,65,67,70,72,75,79,81 %N A073194 Permutation of natural numbers induced by the Catalan bijection gmA073194 acting on the parenthesizations as ordered by A014486. %C A073194 Is there an equivalent Catalan bijection in A073200? %H A073194 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source) %H A073194 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A073194 (Scheme function implementing this automorphism on list-structures:) %o A073194 (define (gmA073194 s) (cond ((pair? s) (gmA072797! s) (gmA073194 (car s)) (gmA072796! s) (gmA073194 (cdr s)))) s) %Y A073194 Inverse permutation: A073195. The car/cdr-flipped conjugate of A073205, i.e. A073194(n) = A057163(A073205(A057163(n))). Cf. also A073196-A073199. %Y A073194 The scheme functions gma072796! and gma072797! referred to below are given in A072796 and A072797. %K A073194 nonn %O A073194 0,3 %A A073194 _Antti Karttunen_, Jun 25 2002