A038732 T(n,n-3), array T as in A038730.

1, 8, 38, 141, 455, 1350, 3805, 10395, 27875, 73945, 194961, 512303, 1343768, 3521381, 9223435, 24152800, 63239810, 165572615, 433485350, 1134892290, 2971202146, 7778726798, 20364993198, 53316270346, 139583838315

Offset: 3

Author

Clark Kimberling, May 02 2000

Keywords

• nonn

Comments

First differences are essentially in A038739. - R. J. Mathar, May 23 2008

Formula

G.f.: x^3/[(1-3x+x^2)(1-x)^5].