A291091 a(n) = A214938(2n+1).

1, 2, 7, 28, 122, 562, 2693, 13288, 67064, 344588, 1796518, 9479780, 50532640, 271710662, 1471935235, 8026070768, 44015873308, 242619318848, 1343427572648, 7469219870968, 41680871386016, 233373274580372, 1310659959443722, 7381448319246248, 41678055955034962

Offset: 0

Author

N. J. A. Sloane, Aug 19 2017

Keywords

• nonn

Links

• Lars Blomberg, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A214938, A291090.

Extensions

a(17)-a(24) from Lars Blomberg, Aug 20 2017