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 A306325 Expansion of e.g.f. log(1 + exp(x)*x*(1 + 7*x + 6*x^2 + x^3)). 2
 0, 1, 15, 35, -650, -5251, 83376, 1623439, -19261584, -836109351, 5365104400, 636771444011, 561938325312, -661384866976523, -7128491581221360, 879709224738485415, 21742632225425026816, -1413667730904479933647, -64871991410092201623024, 2556051301724027073500035, 212244727356899863738042560 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Seiichi Manyama, Table of n, a(n) for n = 0..384 FORMULA E.g.f.: log(1 + Sum_{k>=1} k^4*x^k/k!). a(0) = 0; a(n) = n^4 - (1/n)*Sum_{k=1..n-1} binomial(n,k)*(n - k)^4*k*a(k). MAPLE a:=series(log(1 + exp(x)*x*(1 + 7*x + 6*x^2 + x^3)), x=0, 21): seq(n!*coeff(a, x, n), n=0..20); # Paolo P. Lava, Mar 26 2019 MATHEMATICA nmax = 20; CoefficientList[Series[Log[1 + Exp[x] x (1 + 7 x + 6 x^2 + x^3)], {x, 0, nmax}], x] Range[0, nmax]! a[n_] := a[n] = n^4 - Sum[Binomial[n, k] (n - k)^4 k a[k], {k, 1, n - 1}]/n; a[0] = 0; Table[a[n], {n, 0, 20}] CROSSREFS Cf. A000583, A033464, A279637, A300452. Sequence in context: A328213 A271733 A280883 * A241282 A249056 A219096 Adjacent sequences:  A306322 A306323 A306324 * A306326 A306327 A306328 KEYWORD sign AUTHOR Ilya Gutkovskiy, Feb 07 2019 STATUS approved

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Last modified September 26 01:55 EDT 2021. Contains 347664 sequences. (Running on oeis4.)