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 A194843 #5 Mar 30 2012 18:57:44 %S A194843 1,2,3,4,5,6,10,7,8,9,14,11,15,12,13,19,16,20,17,21,18,25,22,26,23,27, %T A194843 24,28,32,36,29,33,30,34,31,35,40,44,37,41,45,38,42,39,43,49,53,46,50, %U A194843 54,47,51,55,48,52,59,63,56,60,64,57,61,65,58,62,66,70,74,78 %N A194843 Inverse permutation of A194842; every positive integer occurs exactly once. %t A194843 (See A194842.) %Y A194843 Cf. A194841, A194842. %K A194843 nonn %O A194843 1,2 %A A194843 _Clark Kimberling_, Sep 04 2011