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 A125982 #12 May 19 2024 08:09:23 %S A125982 0,1,3,2,8,6,7,4,5,22,19,20,14,15,21,16,17,9,10,18,11,13,12,64,60,61, %T A125982 51,52,62,53,54,37,38,55,39,41,40,63,56,57,42,43,58,44,45,23,24,46,25, %U A125982 27,26,59,47,48,28,29,50,33,36,34,49,30,35,31,32,196,191,192,177,178 %N A125982 Signature-permutation of the inverse of Deutsch's 2000 bijection on ordered trees. %H A125982 Antti Karttunen, <a href="/A125982/b125982.txt">Table of n, a(n) for n = 0..2055</a> %H A125982 Emeric Deutsch, <a href="https://doi.org/10.1006/jcta.1999.3027">A bijection on ordered trees and its consequences</a>, J. Comb. Theory, A, 90, 210-215, 2000. %H A125982 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a>. %o A125982 (MIT Scheme implementation of this automorphism that acts on S-expressions, i.e. list-structures:) (define (*A125982 s) (cond ((null? s) s) (else (map *A125982 (cons (except-last-pair s) (car (last-pair s))))))) %Y A125982 Inverse: A125981. A125984 gives the A057163-conjugate. %K A125982 nonn %O A125982 0,3 %A A125982 _Antti Karttunen_, Jan 02 2007