A125655 - OEIS

A125655

Column 2 of triangle A125653; also equals the eigensequence of the matrix square of A125653.

1, 1, 3, 8, 24, 84, 335, 1495, 7381, 39912, 234360, 1483864, 10070570, 72885794, 560059512, 4551397316, 38984638708, 350888140187, 3309798388178, 32639617094998, 335781293403494, 3596524434640951, 40035909421823293

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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..22.

FORMULA

a(n) = A125653(n+2,2) = Sum_{k=0..n-1} [A125653^2](n-1,k)*a(k) for n>0 with a(0)=1.

CROSSREFS

Cf. A125653 (triangle); rows: A125654, A125656, A125657; A125658 (row sums); A125659 (central terms).

Sequence in context: A242985 A148787 A371979 * A134165 A071016 A174662

Adjacent sequences: A125652 A125653 A125654 * A125656 A125657 A125658

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 30 2006

STATUS

approved