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 A115086 #3 Mar 30 2012 18:36:55 %S A115086 1,1,3,12,58,321,1963,13053,92946,702864,5599204,46746501,407019340, %T A115086 3682922657,34519445611,334288656446,3336972646500,34270606413428, %U A115086 361466138304372,3909661505975148,43305438098350844,490632571238216052 %N A115086 Column 0 of triangle A115085. %Y A115086 Cf. A115085, A115087 (column 1), A115088 (column 2), A115089 (row sums); A115081. %K A115086 nonn %O A115086 0,3 %A A115086 _Paul D. Hanna_, Jan 13 2006