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 A175058 #7 Mar 11 2014 01:32:49 %S A175058 1,3,2,5,6,7,4,9,10,19,11,12,13,14,8,16,17,31,18,33,34,35,20,21,22,40, %T A175058 23,24,25,26,15,28,29,52,30,54,55,56,32,58,59,105,60,61,62,63,36,37, %U A175058 38,68,39,70,71,72,41,42,43,77,44,45,46,47,27,49,50,89,51,91,92,93,53,95 %N A175058 Inverse permutation to A175057. %Y A175058 Cf. A175055, A175056, A175057, A175059, A175060 %K A175058 base,nonn %O A175058 1,2 %A A175058 _Leroy Quet_, Dec 08 2009 %E A175058 Extended by _Ray Chandler_, Dec 18 2009