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 A120236 #2 Mar 30 2012 18:57:06 %S A120236 3,1,8,10,2,15,18,20,23,4,28,5,33,35,6,40,7,45,48,50,53,9,58,60,63,65, %T A120236 11,70,73,12,78,13,83,85,14,90,93,95,98,16,103,17,108,110,113,115,19, %U A120236 120,123,125,128,21,133,135,22,140,143,145,148,24,153,25,138,160,26,165 %N A120236 Inverse of A120235. %C A120236 A permutation of the natural numbers. %Y A120236 Cf. A120229, A120235. %K A120236 nonn %O A120236 1,1 %A A120236 _Clark Kimberling_, Jun 11 2006