A027124 a(n) = A027113(n, 2n-6).

1, 2, 7, 24, 81, 270, 886, 2861, 9109, 28652, 89211, 275420, 844320, 2573161, 7803656, 23569375, 70941900, 212911167, 637427166, 1904416809, 5679745126, 16913962409, 50304623519, 149450737592, 443593524167, 1315613998440

Offset

3,2

Links

Table of n, a(n) for n=3..28.

Crossrefs

Sequence in context: A132788 A109682 A215694 * A038765 A027126 A027128

Adjacent sequences: A027121 A027122 A027123 * A027125 A027126 A027127

Keyword

nonn

Author

Clark Kimberling

Status

approved