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 A086425 #8 Oct 15 2015 10:55:24 %S A086425 0,1,3,2,8,7,6,4,5,22,21,20,17,18,19,16,14,9,11,15,10,13,12,64,63,62, %T A086425 58,59,61,57,54,45,48,55,46,50,49,60,56,53,44,47,51,42,37,23,28,39,25, %U A086425 33,30,52,43,38,24,29,41,27,36,35,40,26,34,31,32,196,195,194,189,190 %N A086425 Permutation of natural numbers induced by the Catalan bijection gma086425 acting on symbolless S-expressions encoded by A014486/A063171. %H A086425 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (With the complete Scheme source) %H A086425 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a> %o A086425 (Scheme function implementing this automorphism on list-structures:) %o A086425 (define (gma086425! s) (gmA057164! (gmA074684! s))) %Y A086425 Inverse: A086426. a(n) = A057164(A074684(n)). Occurs in A073200. Cf. also A086427, A086428, A086429, A086430, A086431. %K A086425 nonn %O A086425 0,3 %A A086425 _Antti Karttunen_, Jun 23 2003