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 A212307 Numerator of n!/3^n. 1
 1, 1, 2, 2, 8, 40, 80, 560, 4480, 4480, 44800, 492800, 1971200, 25625600, 358758400, 1793792000, 28700672000, 487911424000, 975822848000, 18540634112000, 370812682240000, 2595688775680000, 57105153064960000, 1313418520494080000, 10507348163952640000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Also the 3rd column of A152656 (or of A216919). LINKS Table of n, a(n) for n=0..24. FORMULA a(n) = Product_{i=1..n} A038502(i). - Tom Edgar, Mar 22 2014 MATHEMATICA Table[Numerator[n!/3^n], {n, 0, 32}] (* or *) CoefficientList[Series[Exp[3x], {x, 0, 32}], x] // Denominator PROG (PARI) a(n) = numerator(n!/3^n); \\ Michel Marcus, Oct 30 2013 CROSSREFS Cf. A001316, A049606, A125824 (denominators), A152656, A216919. Sequence in context: A318869 A060224 A232980 * A111605 A009544 A077607 Adjacent sequences: A212304 A212305 A212306 * A212308 A212309 A212310 KEYWORD nonn,frac AUTHOR Jean-François Alcover and Paul Curtz, Oct 30 2013 STATUS approved

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Last modified September 11 05:49 EDT 2024. Contains 375814 sequences. (Running on oeis4.)