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A284997
Ceiling(Gamma(n/3)).
2
3, 2, 1, 1, 1, 1, 2, 2, 2, 3, 5, 6, 10, 15, 24, 41, 69, 120, 215, 390, 720, 1356, 2594, 5040, 9941, 19885, 40320, 82835, 172329, 362880, 773119, 1665838, 3628800, 7988888, 17768939, 39916800, 90540730, 207304279, 479001600, 1116669004, 2625854189, 6227020800
OFFSET
1,1
COMMENTS
There are two integer-valued interpolations between successive factorials.
LINKS
FORMULA
a(n) = ceiling(Gamma(n/3)).
MATHEMATICA
Table[Ceiling[Gamma[n/3]], {n, 1, 35}]
CROSSREFS
Sequence in context: A344879 A090189 A227141 * A369367 A306709 A184532
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 08 2017
STATUS
approved