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 A195115 #5 Mar 30 2012 18:57:44 %S A195115 1,3,2,5,6,4,8,9,10,7,15,12,13,14,11,20,21,17,18,19,16,26,27,28,23,24, %T A195115 25,22,33,34,35,36,30,31,32,29,45,41,42,43,44,38,39,40,37,54,55,50,51, %U A195115 52,53,47,48,49,46,64,65,66,60,61,62,63,57,58,59,56,75,76,77 %N A195115 Inverse permutation of A195114; every positive integer occurs exactly once. %t A195115 (See A195114.) %Y A195115 Cf. A195114, A195113, A194954. %K A195115 nonn %O A195115 1,2 %A A195115 _Clark Kimberling_, Sep 09 2011