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 A234026 #8 Dec 31 2013 12:37:05 %S A234026 0,1,2,3,7,6,4,5,8,9,11,10,13,12,14,15,25,24,26,27,28,29,31,30,22,23, %T A234026 21,20,19,18,16,17,42,43,41,40,47,46,44,45,37,36,38,39,32,33,35,34,59, %U A234026 58,56,57,62,63,61,60,52,53,55,54,49,48,50,51,127,126,124 %N A234026 Permutation of nonnegative integers: a(n) = A193231(A054429(n)). %H A234026 Antti Karttunen, <a href="/A234026/b234026.txt">Table of n, a(n) for n = 0..8191</a> %H A234026 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A234026 a(n) = A193231(A054429(n)). %F A234026 a(n) = A054429(A234027(n)). %o A234026 (Scheme) (define (A234026 n) (A193231 (A054429 n))) %Y A234026 Inverse permutation: A234025. Cf. A234024. %K A234026 nonn %O A234026 0,3 %A A234026 _Antti Karttunen_, Dec 28 2013