A026677 T(n,0) + T(n,1) + ... + T(n,n), T given by A026670.

1, 2, 5, 10, 23, 46, 103, 206, 455, 910, 1993, 3986, 8679, 17358, 37633, 75266, 162643, 325286, 701075, 1402150, 3015563, 6031126, 12948083, 25896166, 55513327, 111026654, 237705547, 475411094, 1016736115, 2033472230

Offset

0,2

Links

Table of n, a(n) for n=0..29.

Formula

G.f.: F(x^2) + 2xF(x^2), where xF(x) = g.f. of A054441. - Ralf Stephan, Feb 05 2004

Crossrefs

Partial sums of A026733.

Sequence in context: A007182 A191386 A323988 * A109165 A018344 A284181

Adjacent sequences: A026674 A026675 A026676 * A026678 A026679 A026680

Keyword

nonn

Author

Clark Kimberling

Status

approved