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A258386 Expansion of Product_{k>=1} 1/(1-x^k)^(k+(-1)^k). 1

%I #6 May 28 2015 12:52:28

%S 1,0,3,2,11,10,35,40,107,138,310,432,871,1262,2355,3504,6186,9318,

%T 15799,23934,39351,59672,95772,144970,228258,344244,533552,800952,

%U 1225164,1829530,2767227,4109504,6155310,9089834,13497964,19822252,29208812,42660456

%N Expansion of Product_{k>=1} 1/(1-x^k)^(k+(-1)^k).

%H Vaclav Kotesovec, <a href="/A258386/b258386.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) ~ (2*Zeta(3))^(13/36) / (sqrt(3) * Pi * n^(31/36)) * exp(Zeta'(-1) + 3*Zeta(3)^(1/3) * (n/2)^(2/3)), where Zeta(3) = A002117, Zeta'(-1) = A084448 = 1/12 - log(A074962). - _Vaclav Kotesovec_, May 28 2015

%t nmax=40; CoefficientList[Series[Product[1/(1-x^k)^(k+(-1)^k),{k,1,nmax}],{x,0,nmax}],x]

%Y Cf. A000219, A106507.

%K nonn

%O 0,3

%A _Vaclav Kotesovec_, May 28 2015

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Last modified August 13 09:19 EDT 2024. Contains 375130 sequences. (Running on oeis4.)