A047034 T(n,n-2), array T as in A047030.

1, 1, 4, 18, 74, 295, 1157, 4519, 17620, 68667, 267614, 1043446, 4071222, 15897050, 62124041, 242971209, 951030540, 3725346595, 14603504405, 57286230209, 224869490582, 883247932875, 3471296870925, 13650352416587

Offset

2,3

Links

Table of n, a(n) for n=2..25.

Crossrefs

Sequence in context: A037497 A202358 A075675 * A266753 A307323 A218059

Adjacent sequences: A047031 A047032 A047033 * A047035 A047036 A047037

Keyword

nonn

Author

Clark Kimberling

Status

approved