A027093 a(n) = A027082(n, 2n-6).

1, 1, 5, 17, 57, 190, 623, 2010, 6395, 20103, 62561, 193062, 591637, 1802551, 5465275, 16503365, 49665179, 149033583, 446131159, 1332749213, 3974445543, 11834777320, 35196098205, 104558824915, 310332568225, 920350334943

Offset: 3

Author

Clark Kimberling

Keywords

• nonn