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 A194975 #5 Mar 30 2012 18:57:44 %S A194975 1,2,3,4,5,6,7,8,9,10,11,15,12,13,14,16,20,21,17,18,19,22,26,27,28,23, %T A194975 24,25,29,33,34,35,36,30,31,32,37,41,45,42,43,44,38,39,40,46,50,54,55, %U A194975 51,52,53,47,48,49,56,60,64,65,66,61,62,63,57,58,59,67,71,75 %N A194975 Inverse permutation of A194974; every positive integer occurs exactly once. %C A194975 See A194959 and A194974. %t A194975 (See A194974.) %Y A194975 Cf. A194974. %K A194975 nonn %O A194975 1,2 %A A194975 _Clark Kimberling_, Sep 07 2011