A131438 (2+n)*2^n-2-3*n.

1, 8, 29, 82, 207, 492, 1129, 2534, 5603, 12256, 26589, 57306, 122839, 262100, 557009, 1179598, 2490315, 5242824, 11009989, 23068610, 48234431, 100663228, 209715129, 436207542, 905969587

Offset: 1

Author

Gary W. Adamson, Jul 11 2007

Keywords

• nonn
• easy

Comments

Row sums of triangle A131437.

Examples

			a(3) = 19 = sum of row 3 terms of triangle A131437: (7 + 9 + 13).
		

Links

• Index entries for linear recurrences with constant coefficients, signature (6,-13,12,-4).

Crossrefs

Cf. A131436, A131437, A131439.

Formula

Binomial transform of A131439.

G.f.: -x*(-1-2*x+6*x^2) / ( (2*x-1)^2*(x-1)^2 ). - R. J. Mathar, Sep 24 2011

Extensions

Definition replaced by formula. - R. J. Mathar, Sep 24 2011