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A262011
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a(n) = (1/n!) * Product_{k=1..n} (k^3 + 1).
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1
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1, 2, 9, 84, 1365, 34398, 1244061, 61136712, 3920391657, 317987323290, 31830531061329, 3854387943062748, 555353062796290941, 93897387078942114486, 18410594823692578876005, 4143611208319076419026192, 1061023445030203505546894289, 306698188757554119191614031538, 99387251945711843180260258108953
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OFFSET
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0,2
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COMMENTS
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Logarithmic derivative equals A262003.
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LINKS
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FORMULA
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a(n) = (n+1) * Product_{k=1..n} (k^2 - k + 1).
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MATHEMATICA
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Table[1/n! Product[k^3+1, {k, n}], {n, 0, 20}] (* Harvey P. Dale, Jul 19 2019 *)
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PROG
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(PARI) {a(n)=prod(k=1, n, (k^3+1))/n!}
for(n=0, 30, print1(a(n), ", "))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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