A086613 Row sums of triangle A086612.

1, 2, 3, 8, 27, 95, 346, 1298, 4982, 19481, 77344, 310981, 1263768, 5182584, 21420400, 89139754, 373179358, 1570606386, 6641563144, 28204255713, 120231876230, 514315720218, 2207041605690, 9498267611429, 40985335385212

Offset

0,2

Links

Table of n, a(n) for n=0..24.

Formula

G.f.: A(x) = (1+x) - x^2*(1+x)^2 + x*A(x)^2.

Example

a(3)=-2-1+6+5=8, a(4)=-1-6+0+20+14=27, a(5)=0-5-22+10+70+42=95.

Crossrefs

Cf. A086612 (triangle), A086634.

Sequence in context: A041399 A183948 A041503 * A121401 A318895 A093858

Adjacent sequences: A086610 A086611 A086612 * A086614 A086615 A086616

Keyword

nonn

Author

Paul D. Hanna, Jul 24 2003

Status

approved