A086633 Row sums of triangle A086632.

1, 2, 6, 28, 159, 984, 6406, 43222, 299631, 2121721, 15282329, 111621879, 824812768, 6154988092, 46318172220, 351105380284, 2678473144801, 20548178604408, 158424726746707

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Formula

G.f.: A(x) = (1-2x)/(1-x)^3 + x*A(x)^3.

Example

a(1)=1+1=2, a(2)=0+3+3=6, a(3)=-2+3+15+12=28, a(4)=-5-5+30+84+55=159.

Crossrefs

Cf. A086632 (table).

Sequence in context: A326928 A277381 A184695 * A354311 A201950 A358265

Adjacent sequences: A086630 A086631 A086632 * A086634 A086635 A086636

Keyword

nonn

Author

Paul D. Hanna, Jul 24 2003

Status

approved