A105538 - OEIS

A105538

Row sums of triangle A105537, which equals the matrix square of triangle A105535.

1, 3, 9, 17, 61, 138, 238, 634, 1421, 2707, 4487, 9709, 27875, 82827, 219133, 524502, 1262352, 3276409, 8827139, 22596514, 54006726, 122265827, 275484693, 658076339, 1654581392, 4100759772, 9761051499, 22296252002, 49175830726

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OFFSET

0,2

COMMENTS

Also equals column 0 of triangle A105539. Triangular matrix A105535 has the property that diagonal n equals A105535^(n+1) when flattened as read by rows.

LINKS

Table of n, a(n) for n=0..28.

CROSSREFS

Cf. A105535, A105537.

Sequence in context: A343781 A321869 A009211 * A374692 A056404 A056405

Adjacent sequences: A105535 A105536 A105537 * A105539 A105540 A105541

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Apr 12 2005

STATUS

approved