A026619 T(2n-1,n-1), T given by A026615.

1, 5, 17, 60, 217, 798, 2970, 11154, 42185, 160446, 613054, 2351440, 9048522, 34916300, 135059220, 523521630, 2033066025, 7908332190, 30807696150, 120173896920, 469334610030, 1834970026500

Offset

1,2

Links

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

Crossrefs

Sequence in context: A149660 A149661 A146130 * A142956 A273422 A192146

Adjacent sequences: A026616 A026617 A026618 * A026620 A026621 A026622

Keyword

nonn

Author

Clark Kimberling

Status

approved