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 A135905 #2 Mar 30 2012 18:37:08 %S A135905 1,4,24,186,1736,18754,228658,3092316,45802294,735881882,12727541778, %T A135905 235515880084,4638914346322,96840935881898,2134717733185118, %U A135905 49529467079270060,1206148832249659798,30751284267472226682 %N A135905 Column 3 of triangle A135902. %Y A135905 Cf. A135902; A135903, A135904. %K A135905 nonn %O A135905 0,2 %A A135905 _Paul D. Hanna_, Dec 18 2007