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A285286
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Expansion of Product_{k>=0} 1/(1 + x^(3*k+1))^(3*k+1).
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2
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1, -1, 1, -1, -3, 3, -3, -4, 14, -14, 4, 24, -44, 31, 37, -107, 126, -4, -208, 329, -175, -319, 777, -704, -236, 1507, -1945, 430, 2532, -4575, 2781, 3236, -9301, 8697, 2085, -16902, 21804, -5233, -26573, 47225, -27047, -34332, 92242, -80162, -26926, 162426
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OFFSET
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0,5
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LINKS
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MATHEMATICA
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nmax = 50; CoefficientList[Series[Product[1/(1 + x^(3*k-2))^(3*k-2), {k, 1, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Apr 16 2017 *)
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CROSSREFS
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Product_{k>=0} 1/(1 + x^(m*k+1))^(m*k+1): A284628 (m=2), this sequence (m=3), A285287 (m=4).
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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