A045990 a(n) = A034997(n)/2.

1, 3, 16, 185, 5646, 533022, 173663176

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Crossrefs

Sequence in context: A254430 A180721 A192668 * A007006 A174137 A166860

Adjacent sequences: A045987 A045988 A045989 * A045991 A045992 A045993

Keyword

nonn,more

Author

N. J. A. Sloane

Status

approved