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A107235 Expansion of 1 / Product_{n>=0} (1 - q^(5n+1))*(1 - q^(5n+2))*(1 - q^(5n+4)). 6

%I #12 Jan 07 2021 09:52:37

%S 1,1,2,2,4,4,7,8,12,14,19,23,31,37,48,57,73,86,109,128,159,187,229,

%T 269,326,382,458,535,638,742,879,1019,1200,1388,1625,1875,2185,2514,

%U 2916,3347,3868,4427,5099,5822,6683,7614,8712,9904,11301,12821,14589

%N Expansion of 1 / Product_{n>=0} (1 - q^(5n+1))*(1 - q^(5n+2))*(1 - q^(5n+4)).

%H Vaclav Kotesovec, <a href="/A107235/b107235.txt">Table of n, a(n) for n = 0..10000</a>

%F a(n) ~ Pi^(2/5) * exp(Pi*sqrt(2*n/5)) / (Gamma(3/5) * 2^(7/10) * 5^(4/5) * n^(7/10)). - _Vaclav Kotesovec_, Jan 07 2021

%t nmax = 50; CoefficientList[Series[1/Product[(1 - x^(5*k+1))*(1 - x^(5*k+2))*(1 - x^(5*k+4)), {k, 0, nmax/5}], {x, 0, nmax}], x] (* _Vaclav Kotesovec_, Jan 07 2021 *)

%Y Cf. A035959, A107234, A107236, A107237.

%K nonn

%O 0,3

%A _Ralf Stephan_, May 13 2005

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)