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A294976 Coefficients in expansion of (E_6/E_2^6)^(1/12). 6

%I #17 Jun 03 2018 09:16:28

%S 1,-30,-11340,-3912600,-1520905170,-636170644008,-278687199310200,

%T -126000360658968000,-58290111778749466140,-27440829122946510954630,

%U -13096614404248661886145848,-6320198941502349713305002120,-3077986352751848627729986859400

%N Coefficients in expansion of (E_6/E_2^6)^(1/12).

%F G.f.: Product_{n>=1} (1-q^n)^A294975(n).

%F a(n) ~ -Gamma(1/3)^2 * Gamma(1/4)^(10/3) * exp(2*Pi*n) / (16 * 2^(1/12) * 3^(7/12) * Pi^(5/2) * Gamma(1/12) * n^(13/12)). - _Vaclav Kotesovec_, Jun 03 2018

%t terms = 13;

%t E2[x_] = 1 - 24*Sum[k*x^k/(1 - x^k), {k, 1, terms}];

%t E6[x_] = 1 - 504*Sum[k^5*x^k/(1 - x^k), {k, 1, terms}];

%t (E6[x]/E2[x]^6)^(1/12) + O[x]^terms // CoefficientList[#, x]& (* _Jean-François Alcover_, Feb 26 2018 *)

%Y Cf. A109817, A289565, A294974, A294975.

%K sign

%O 0,2

%A _Seiichi Manyama_, Feb 12 2018

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Last modified May 13 23:15 EDT 2024. Contains 372524 sequences. (Running on oeis4.)