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 A131395 #7 May 18 2015 15:58:15 %S A131395 1,2,4,3,8,5,10,7,16,6,9,11,24,13,30,15,34,17,12,19,21,14,46,23,48,25, %T A131395 27,18,56,29,20,31,22,33,35,77,41,37,39,26,43,28,75,45,73,71,47,32,67, %U A131395 49,69,51,53,36,65,55,63,38,42,40,57,59,61,44,99,97,87,93,78,91,50,89 %N A131395 Conjectured permutation of the positive integers; inverse of conjectured permutation A131393. %F A131395 Inverse of A131393. %Y A131395 Cf. A131388, A131389, A131390, A131391, A131392, A131393, A131394, A131396, A131397. %K A131395 nonn %O A131395 1,2 %A A131395 _Clark Kimberling_, Jul 05 2007