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

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Partial sums of A026733.

Formula

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