A026683 T(2n,n-1), T given by A026681.

1, 7, 26, 150, 561, 3181, 12101, 68514, 263959, 1496375, 5818228, 33039504, 129350028, 735726968, 2895663570, 16493980890, 65189381839, 371790856907, 1474431012804, 8418159673710, 33478067835325, 191320477252349, 762651878154895

Offset

1,2

Links

Table of n, a(n) for n=1..23.

Crossrefs

Sequence in context: A349309 A262110 A319425 * A197053 A009375 A009380

Adjacent sequences: A026680 A026681 A026682 * A026684 A026685 A026686

Keyword

nonn

Author

Clark Kimberling

Status

approved