A291088 a(n) = A026520(2n).

1, 2, 8, 38, 196, 1052, 5774, 32146, 180772, 1024256, 5837908, 33433996, 192239854, 1109049320, 6416509142, 37215072638, 216309089956, 1259663964184, 7347943049432, 42926944354480, 251119894730596, 1470830479288432, 8624336421678788, 50620679934081988

Offset

0,2

Links

Lars Blomberg, Table of n, a(n) for n = 0..500

Crossrefs

Cf. A026520, A291089.

Sequence in context: A112109 A345178 A026939 * A047098 A271934 A364723

Adjacent sequences: A291085 A291086 A291087 * A291089 A291090 A291091

Keyword

nonn

Author

N. J. A. Sloane, Aug 19 2017

Extensions

a(15)-a(23) from Lars Blomberg, Sep 01 2017

Status

approved