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A374014
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Expansion of (Sum_{k>=0} x^(k^4))^16.
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1
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1, 16, 120, 560, 1820, 4368, 8008, 11440, 12870, 11440, 8008, 4368, 1820, 560, 120, 16, 17, 240, 1680, 7280, 21840, 48048, 80080, 102960, 102960, 80080, 48048, 21840, 7280, 1680, 240, 16, 120, 1680, 10920, 43680, 120120, 240240, 360360, 411840, 360360, 240240, 120120, 43680, 10920, 1680, 120, 0
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OFFSET
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0,2
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COMMENTS
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Number of ways to write n as an ordered sum of 16 fourth powers (A000583).
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LINKS
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FORMULA
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a(n) > 0 for n > 13792.
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PROG
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(PARI) my(N=50, x='x+O('x^N)); Vec(sum(k=0, sqrtnint(N, 4), x^k^4)^16)
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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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