A125862 Column 2 of table A125860; also equals row sums of matrix power A097712^2.

1, 3, 12, 69, 612, 8853, 217041, 9245253, 695682342, 93580638024, 22713677612832, 10025101876435413, 8100572528598910191, 12054728928174188426943, 33214476295395054879355617, 170255688895444623691322464599

Offset: 0

Author

Paul D. Hanna, Dec 13 2006

Keywords

• nonn

Comments

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).

Crossrefs

Cf. A125860; A097712; other columns: A016121, A125863, A125864, A125865; A125861 (diagonal), A125859 (antidiagonal sums).