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 A194837 #5 Mar 30 2012 18:57:44 %S A194837 1,3,2,5,4,6,8,10,7,9,12,14,11,13,15,17,19,21,16,18,20,28,23,25,27,22, %T A194837 24,26,35,30,32,34,29,36,31,33,43,38,45,40,42,37,44,39,41,52,47,54,49, %U A194837 51,46,53,48,55,50,62,57,64,59,66,61,56,63,58,65,60,78,73,68 %N A194837 Inverse permutation of A194836; every positive integer occurs exactly once. %t A194837 (See A194835.) %Y A194837 Cf. A194836, A194835, A194832. %K A194837 nonn %O A194837 1,2 %A A194837 _Clark Kimberling_, Sep 03 2011