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 A114651 #6 Apr 09 2014 10:16:58 %S A114651 1,3,2,4,6,8,10,5,7,9,11,13,15,17,19,21,23,25,27,29,12,14,16,18,20,22, %T A114651 24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68, %U A114651 70,72,74,76,78,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65 %N A114651 Inverse permutation to sequence A114650. %Y A114651 Cf. A114650. %K A114651 easy,nonn %O A114651 1,2 %A A114651 _Leroy Quet_, Dec 21 2005 %E A114651 More terms from _Klaus Brockhaus_, Dec 25 2005