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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
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OFFSET
2,2
LINKS
Table of n, a(n) for n=2..20.
CROSSREFS
Sequence in context:
A134435
A136718
A362709
*
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 April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)