A026620 T(2n-1,n-2), T given by A026615.

1, 9, 37, 147, 576, 2244, 8723, 33891, 131716, 512278, 1994202, 7770734, 30310320, 118343970, 462501135, 1809134115, 7082699580, 27750808470, 108812919270, 426966196410, 1676471166240

Offset

2,2

Links

Table of n, a(n) for n=2..22.

Crossrefs

Sequence in context: A271908 A257448 A288415 * A048878 A246315 A232250

Adjacent sequences: A026617 A026618 A026619 * A026621 A026622 A026623

Keyword

nonn

Author

Clark Kimberling

Status

approved