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

4,2

Links

Table of n, a(n) for n=4..27.

Formula

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

Crossrefs

Sequence in context: A006550 A047780 A055251 * A004142 A006529 A337001

Adjacent sequences: A038730 A038731 A038732 * A038734 A038735 A038736

Keyword

nonn

Author

Clark Kimberling, May 02 2000

Status

approved