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 A195112 #5 Mar 30 2012 18:57:44 %S A195112 1,3,2,5,6,4,10,8,9,7,14,15,12,13,11,19,20,21,17,18,16,28,25,26,27,23, %T A195112 24,22,35,36,32,33,34,30,31,29,43,44,45,40,41,42,38,39,37,52,53,54,55, %U A195112 49,50,51,47,48,46,66,62,63,64,65,59,60,61,57,58,56,77,78,73 %N A195112 Inverse permutation of A195111; every positive integer occurs exactly once. %t A195112 (See A195111.) %Y A195112 Cf. A195111, A195110, A002260, A194959, A195107. %K A195112 nonn %O A195112 1,2 %A A195112 _Clark Kimberling_, Sep 09 2011