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 A086630 #3 Mar 30 2012 18:36:38 %S A086630 1,2,13,124,1419,18037,245650,3513260,52114339,795230788,12411836882, %T A086630 197327486617,3185686181794,52101500060794,861628197679360 %N A086630 Main diagonal of square table A086629; coefficients of x^n*y^n in f(x,y) that satisfies f(x,y) = 1/[(1-x)(1-y)] + xy*f(x,y)^3. %Y A086630 Cf. A086629 (table), A086631 (antidiagonal sums). %K A086630 nonn %O A086630 0,2 %A A086630 _Paul D. Hanna_, Jul 24 2003