A026716 T(2n,n-1), T given by A026714.

1, 7, 40, 217, 1157, 6128, 32366, 170731, 900070, 4743641, 24996639, 131709418, 693958384, 3656283198, 19263738121, 101493477133, 534729209960, 2817271322394, 14843040451314, 78201799914387, 412012556289626, 2170721261223869

Offset

1,2

Links

Table of n, a(n) for n=1..22.

Crossrefs

Sequence in context: A227748 A349594 A083327 * A026782 A099459 A243875

Adjacent sequences: A026713 A026714 A026715 * A026717 A026718 A026719

Keyword

nonn

Author

Clark Kimberling

Status

approved