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A169760
A169759(n)/6.
1
1, 4, 16, 62, 246, 980, 3912, 15632, 62494, 249904
OFFSET
2,2
CROSSREFS
Sequence in context: A227438 A206839 A244827 * A222699 A034542 A289594
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 06 2010
STATUS
approved