A038733 T(n,n-4), array T as in A038730.

1, 10, 57, 245, 888, 2881, 8679, 24872, 68940, 186953, 499927, 1325204, 3494249, 9184675, 24098536, 63165197, 165471668, 433350754, 1134715190, 2970971916, 7778430788, 20364616458, 53315795326, 139583244540

Offset: 4

Author

Clark Kimberling, May 02 2000

Keywords

• nonn

Formula

G.f.: x^4/[(1-3x+x^2)(1-x)^7].