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A112362 A006967(n)/2. 0
1, 2, 2, 4, 12, 16, 20, 60, 148, 324, 664, 1600, 4956, 12796, 27960, 71596, 255348, 725648, 1748672 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..20.

CROSSREFS

Sequence in context: A112473 A134435 A136718 * A134720 A019225 A002840

Adjacent sequences:  A112359 A112360 A112361 * A112363 A112364 A112365

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 02 2005

STATUS

approved

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Last modified December 9 08:41 EST 2021. Contains 349627 sequences. (Running on oeis4.)