A125654 Column 1 of triangle A125653; also equals the eigensequence of triangle A125653.

1, 1, 2, 4, 9, 24, 75, 269, 1091, 4940, 24699, 135141, 803122, 5150259, 35436569, 260300079, 2032260757, 16798435176, 146498077799, 1343752561687, 12927673809234, 130120187348654, 1367117984143960, 14962669807495136

Offset

0,3

Comments

Column k of triangle A125653 equals the eigensequence of matrix power A125653^k for k>=0.

Links

Table of n, a(n) for n=0..23.

Formula

a(n) = A125653(n+1,1) = Sum_{k=0..n-1} A125653(n-1,k)*a(k) for n>0 with a(0)=1.

Crossrefs

Cf. A125653 (triangle); rows: A125655, A125656, A125657; A125658 (row sums); A125659 (central terms).

Sequence in context: A009283 A236756 A291378 * A141824 A005001 A091151

Adjacent sequences: A125651 A125652 A125653 * A125655 A125656 A125657

Keyword

nonn

Author

Paul D. Hanna, Nov 30 2006

Status

approved