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 A175056 #7 Mar 11 2014 01:32:49 %S A175056 1,3,2,5,9,6,4,8,14,24,15,10,17,11,7,13,22,37,23,39,64,40,25,16,27,45, %T A175056 28,18,30,19,12,21,35,58,36,60,98,61,38,63,103,168,104,65,106,66,41, %U A175056 26,43,71,44,73,119,74,46,29,48,79,49,31,51,32,20,34,56,92,57,94,153,95,59 %N A175056 Inverse permutation to A175055. %Y A175056 Cf. A175055, A175057, A175058, A175059, A175060 %K A175056 base,nonn %O A175056 1,2 %A A175056 _Leroy Quet_, Dec 08 2009 %E A175056 Extended by _Ray Chandler_, Dec 18 2009