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 A234024 #9 Dec 31 2013 12:36:33 %S A234024 0,1,3,2,6,5,4,7,15,10,9,12,11,14,13,8,24,23,18,29,20,27,30,17,16,31, %T A234024 26,21,28,19,22,25,57,40,39,54,45,60,51,34,33,48,63,46,53,36,43,58,41, %U A234024 56,55,38,61,44,35,50,49,32,47,62,37,52,59,42,106,89,72,123 %N A234024 Self-inverse permutation of nonnegative integers, A059893-conjugate of blue code: a(n) = A059893(A193231(A059893(n))). %H A234024 Antti Karttunen, <a href="/A234024/b234024.txt">Table of n, a(n) for n = 0..8191</a> %H A234024 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A234024 a(n) = A059893(A193231(A059893(n))). %F A234024 a(n) = A059894(A234027(A059894(n))). %o A234024 (Scheme) (define (A234024 n) (A059893 (A193231 (A059893 n)))) %Y A234024 Cf. A059893, A059894, A193231, A234025-A234027. %K A234024 nonn %O A234024 0,3 %A A234024 _Antti Karttunen_, Dec 28 2013