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 A125865 #3 Mar 30 2012 18:37:02 %S A125865 1,6,51,651,13131,435801,24530016,2394413286,412135908606, %T A125865 126722253316281,70336222713070656,71088278975389204986, %U A125865 131802456226253519662956,451158681817567800972000111 %N A125865 Column 5 of table A125860; also equals row sums of matrix power A097712^5. %C A125865 Equals column 0 of matrix power A097712^6, where triangle A097712 satisfies recurrence: A097712(n,k) = A097712(n-1,k) + [A097712^2](n-1,k-1). %Y A125865 Cf. A125860; A097712; other columns: A016121, A125862, A125863, A125864; A125861 (diagonal), A125859 (antidiagonal sums). %K A125865 nonn %O A125865 0,2 %A A125865 _Paul D. Hanna_, Dec 13 2006