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 A135439 #1 Jun 29 2008 03:00:00 %S A135439 9,13,14,17,18,22,26,29,30,33,37,41,45,58,65,66,73,77,78,81,102,105, %T A135439 113,121,122,134,141,142,145,174,178,185,186,193,206,214,221,225,246, %U A135439 257,261,274,281,302,314,318,357,358,366,393,397,402,425,437 %N A135439 Positions of A136048(n) in A136047. %K A135439 nonn %O A135439 1,1 %A A135439 Zak Seidov, Dec 15 2007