A027128 a(n) = A027113(n, 2n-10).

1, 2, 7, 24, 81, 274, 927, 3132, 10552, 35395, 118065, 391320, 1288260, 4212091, 13679558, 44141377, 141571286, 451475589, 1432198967, 4521270066, 14209424215, 44474645476, 138681426899, 430955113144, 1334997086607

Offset: 5

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Cf. A027113.