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A317171 a(n) = n! * [x^n] 1/(1 + n*log(1 - x)). 4

%I #12 Oct 05 2018 17:24:54

%S 1,1,10,222,8824,553870,50545008,6328330344,1041597412224,

%T 218138133235680,56650689388344000,17868469522986145536,

%U 6728682216722958185472,2981868816113406609186576,1536217706761623823662025728,910442461680276910819097616000,615053979239579281793375485526016

%N a(n) = n! * [x^n] 1/(1 + n*log(1 - x)).

%F a(n) = Sum_{k=0..n} |Stirling1(n,k)|*n^k*k!.

%F a(n) ~ sqrt(2*Pi) * n^(2*n + 1/2) / exp(n - 1/2). - _Vaclav Kotesovec_, Jul 23 2018

%t Table[n! SeriesCoefficient[1/(1 + n Log[1 - x]), {x, 0, n}], {n, 0, 16}]

%t Join[{1}, Table[Sum[Abs[StirlingS1[n, k]] n^k k!, {k, n}], {n, 16}]]

%Y Cf. A007840, A088500, A094420, A242817, A317172.

%Y Main diagonal of A320079.

%K nonn

%O 0,3

%A _Ilya Gutkovskiy_, Jul 23 2018

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Last modified May 1 22:42 EDT 2024. Contains 372178 sequences. (Running on oeis4.)