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 A256231 #7 Mar 19 2015 22:08:54 %S A256231 1,2,3,4,5,7,6,9,10,15,8,11,12,16,13,19,21,31,17,23,25,33,14,20,22,32, %T A256231 18,24,26,34,27,39,43,63,35,47,51,67,29,41,45,65,37,49,53,69,28,40,44, %U A256231 64,36,48,52,68,30,42,46,66,38,50,54,70,55,79,87,127,71 %N A256231 Inverse of permutation in A185969. %C A256231 Permutation of the natural numbers A000027 with inverse permutation A185969. %H A256231 Alois P. Heinz, <a href="/A256231/b256231.txt">Table of n, a(n) for n = 1..16383</a> %H A256231 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A256231 Cf. A185969. %K A256231 nonn,look %O A256231 1,2 %A A256231 _Alois P. Heinz_, Mar 19 2015