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 A263268 #6 Dec 03 2015 04:35:14 %S A263268 0,1,2,3,4,6,5,11,7,8,9,12,10,15,13,16,17,20,14,26,18,27,19,30,21,22, %T A263268 23,34,24,38,25,46,28,47,29,50,39,54,32,55,31,59,33,67,35,60,37,68,36, %U A263268 43,40,74,44,81,45,82,41,88,49,95,42,103,52,96,97,108,53,114,57,115,58,120,48,128,63,121,64,138,65,145,66 %N A263268 Inverse permutation to A263267. %H A263268 Antti Karttunen, <a href="/A263268/b263268.txt">Table of n, a(n) for n = 0..8250</a> %H A263268 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A263268 Inverse: A263267. %Y A263268 Differs from A263266 for the first time at n=38, where a(38) = 32, while A263266(38) = 31. %K A263268 nonn %O A263268 0,3 %A A263268 _Antti Karttunen_, Nov 30 2015