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 A194105 #5 Mar 30 2012 18:57:40 %S A194105 1,3,2,5,6,10,4,8,9,14,15,7,12,13,19,20,21,28,11,17,18,25,26,27,35,36, %T A194105 16,23,24,32,33,34,43,44,45,22,30,31,40,41,42,52,53,54,55,66,29,38,39, %U A194105 49,50,51,62,63,64,65,77,78,37,47,48,59,60,61,73,74,75,76,89 %N A194105 Inverse permutation of A194104; every positive integer occurs exactly once. %t A194105 (See A194104.) %Y A194105 Cf. A194104. %K A194105 nonn %O A194105 1,2 %A A194105 _Clark Kimberling_, Aug 15 2011