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 A114862 #9 Apr 09 2014 10:12:21 %S A114862 2,1,4,3,6,7,5,9,10,11,8,13,12,15,16,17,14,19,18,21,22,23,20,25,24,27, %T A114862 28,29,26,31,30,33,34,35,36,37,32,39,40,41,38,43,42,45,46,47,44,49,48, %U A114862 51,52,53,50,55,54,57,58,59,56,61,60,63,64,65,66,67,62,69,70,71,68,73 %N A114862 Inverse permutation to sequence A114861. %Y A114862 Cf. A114861. %K A114862 nonn %O A114862 1,1 %A A114862 _Leroy Quet_, Jan 02 2006 %E A114862 More terms from _Ray Chandler_ and _Klaus Brockhaus_, Jan 02 2006