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A265829
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Expansion of Product_{k>=1} 1/(1 - (4*k-2)*x^(4*k-2)).
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7
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1, 0, 2, 0, 4, 0, 14, 0, 28, 0, 66, 0, 168, 0, 350, 0, 760, 0, 1754, 0, 3692, 0, 7766, 0, 17076, 0, 35282, 0, 73232, 0, 156758, 0, 320768, 0, 658978, 0, 1380612, 0, 2808534, 0, 5732780, 0, 11849002, 0, 23997576, 0, 48701918, 0, 99744056, 0, 201405042
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OFFSET
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0,3
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LINKS
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FORMULA
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If n is even, then a(n) ~ c * 2^(n/2), where c = 6.8748052998532604456256851165148110527112306899116599334584... .
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MATHEMATICA
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nmax = 40; CoefficientList[Series[Product[1/(1 - (4*k-2)*x^(4*k-2)), {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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