A291090 a(n) = A214938(2n).

1, 1, 3, 11, 46, 207, 977, 4769, 23872, 121862, 631958, 3319923, 17630692, 94493713, 510468519, 2776629563, 15194389388, 83591476528, 462062822648, 2564995473974, 14293435176216, 79927207249606, 448358398361618, 2522381161938591, 14228119729773226

Offset

0,3

Links

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

Crossrefs

Cf. A214938, A291091.

Sequence in context: A271959 A151141 A275757 * A155134 A006605 A357233

Adjacent sequences: A291087 A291088 A291089 * A291091 A291092 A291093

Keyword

nonn

Author

N. J. A. Sloane, Aug 19 2017

Extensions

a(18)-a(24) from Lars Blomberg, Aug 20 2017

Status

approved