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A265828
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Expansion of Product_{k>=1} 1/(1 - (4*k-1)*x^(4*k-1)).
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7
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1, 0, 0, 3, 0, 0, 9, 7, 0, 27, 21, 11, 81, 63, 82, 258, 189, 246, 851, 586, 738, 2896, 1984, 2237, 8688, 6491, 7009, 26091, 21874, 22609, 78868, 65653, 71600, 240021, 197686, 231642, 731137, 599038, 696146, 2219861, 1821033, 2098301, 6778660, 5540660
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OFFSET
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0,4
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LINKS
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FORMULA
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a(n) ~ c * 3^(n/3), where
c = 1.440862416741436228307395343405986172843082997125243989739... if mod(n,3) = 0
c = 0.839303125100473007517704405672941818726137049977537857220... if mod(n,3) = 1
c = 0.669924376359406710094617326814984989681716404092521759237... if mod(n,3) = 2.
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MATHEMATICA
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nmax = 40; CoefficientList[Series[Product[1/(1 - (4*k-1)*x^(4*k-1)), {k, 1, nmax}], {x, 0, nmax}], x]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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