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 A122281 #8 Apr 09 2014 10:15:52 %S A122281 1,2,5,3,9,4,14,12,6,8,18,7,24,13,10,22,28,11,36,31,15,17,41,16,32,23, %T A122281 20,34,51,21,57,45,19,27,33,26,65,35,25,39,72,30,79,47,38,40,84,43,54, %U A122281 44,29,60,95,46,48,55,37,50,104,49,112,56,53,63,61,59,121,70,42,62,135 %N A122281 Inverse permutation to sequence A122280. %Y A122281 Cf. A122280. %K A122281 nonn %O A122281 1,2 %A A122281 _Leroy Quet_, Aug 29 2006 %E A122281 Extended by _Ray Chandler_ and _Klaus Brockhaus_, Aug 30 2006