A125783 Column 3 of table A125781; also, equals column 1 of matrix power A091351^2.

1, 4, 14, 52, 217, 1033, 5604, 34416, 237328, 1822753, 15473117, 144165763, 1464992791, 16144683412, 191967912402, 2451561765083, 33487399558154, 487448547177703, 7535687673952024, 123349262218035648

Offset

0,2

Comments

Column k of triangle A091351 = row sums of matrix power A091351^k for k>=0.

Links

Table of n, a(n) for n=0..19.

Formula

a(n) = A091352(n+2) - A091352(n+1) - 1.

Crossrefs

Cf. A091351; other columns: A091352, A125782, A125784, A125785, A125786.

Sequence in context: A129997 A308023 A149489 * A090319 A295518 A047118

Adjacent sequences: A125780 A125781 A125782 * A125784 A125785 A125786

Keyword

nonn

Author

Paul D. Hanna, Dec 09 2006

Status

approved