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 A195078 #5 Mar 30 2012 18:57:44 %S A195078 1,3,2,5,6,4,8,10,9,7,12,15,14,13,11,17,20,21,19,18,16,23,26,28,27,25, %T A195078 24,22,30,33,36,35,34,32,31,29,38,41,44,45,43,42,40,39,37,47,50,53,55, %U A195078 54,52,51,49,48,46,57,60,63,66,65,64,62,61,59,58,56,68,71,74 %N A195078 Inverse permutation of A195077; every positive integer occurs exactly once. %C A195078 Not the same as A194916. %t A195078 (See A195077.) %Y A195078 Cf. A195077, A195076. %K A195078 nonn %O A195078 1,2 %A A195078 _Clark Kimberling_, Sep 08 2011