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 A292308 E.g.f.: 1/Product_{k>=1} (1 + x^k/k!). 3
 1, -1, 1, -4, 21, -96, 520, -3795, 32053, -284368, 2763876, -30648465, 373339824, -4833294389, 67167087793, -1009753574739, 16215467043493, -275361718915824, 4947532173402532, -94054153646919213, 1882793796608183356, -39528099512321898363 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Table of n, a(n) for n=0..21. FORMULA a(n) = (-1)^n * A076901(n). a(n) ~ c * (-1)^n * n!, where c = Product_{k>=2} (1 + (-1)^k/k!) = 0.77351587386... - Vaclav Kotesovec, Sep 14 2017 MATHEMATICA nmax = 20; Table[SeriesCoefficient[Product[1/(1 + x^k/k!), {k, 1, n}], {x, 0, n}], {n, 0, nmax}] * Range[0, nmax]! (* Vaclav Kotesovec, Sep 14 2017 *) CROSSREFS Cf. A005651, A007837, A076901. Sequence in context: A220574 A231377 A017967 * A076901 A080043 A240456 Adjacent sequences: A292305 A292306 A292307 * A292309 A292310 A292311 KEYWORD sign AUTHOR Seiichi Manyama, Sep 14 2017 STATUS approved

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Last modified August 14 22:58 EDT 2024. Contains 375167 sequences. (Running on oeis4.)