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A285003 a(n) = ceiling(Gamma(3n/4)). 2
2, 1, 2, 2, 5, 12, 36, 120, 454, 1872, 8377, 40320, 207359, 1133279, 6552135, 39916800, 255371836, 1710542069, 11964299313, 87178291200, 660355655454, 5189998453041, 42249866656928, 355687428096000, 3092228855290535, 27724322986333719, 256040133328476466 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
There are three integer-valued interpolations between successive factorials.
LINKS
FORMULA
a(n) = ceiling(Gamma(3n/4)).
MAPLE
seq(ceil(GAMMA(3*n/4)), n=1..50); # Robert Israel, Apr 19 2017
MATHEMATICA
Table[Ceiling[Gamma[3n/4]], {n, 1, 35}]
CROSSREFS
Sequence in context: A214968 A340059 A095291 * A364872 A284002 A093659
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 17 2017
STATUS
approved

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)