A047770 a(n) = A047769(2n).

0, 1, 5, 26, 133, 708, 3860, 21604, 123266, 715216, 4206956, 25032840, 150413322, 911379384, 5562367173, 34164355715, 211015212580, 1309815397995, 8166460799097, 51120054233490, 321156223592865, 2024257417808379, 12797201858645100, 81125118975874896, 515573991508620164, 3284258706735132028

Offset

1,3

Links

Table of n, a(n) for n=1..26.

Crossrefs

Sequence in context: A033115 A033123 A331883 * A047757 A047755 A047768

Adjacent sequences: A047767 A047768 A047769 * A047771 A047772 A047773

Keyword

nonn

Author

N. J. A. Sloane

Status

approved