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 A125862 #3 Mar 30 2012 18:37:02 %S A125862 1,3,12,69,612,8853,217041,9245253,695682342,93580638024, %T A125862 22713677612832,10025101876435413,8100572528598910191, %U A125862 12054728928174188426943,33214476295395054879355617,170255688895444623691322464599 %N A125862 Column 2 of table A125860; also equals row sums of matrix power A097712^2. %C A125862 Equals column 0 of matrix power A097712^3, where triangle A097712 satisfies recurrence: A097712(n,k) = A097712(n-1,k) + [A097712^2](n-1,k-1). %Y A125862 Cf. A125860; A097712; other columns: A016121, A125863, A125864, A125865; A125861 (diagonal), A125859 (antidiagonal sums). %K A125862 nonn %O A125862 0,2 %A A125862 _Paul D. Hanna_, Dec 13 2006