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A303672
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a(n) = [x^n] (5040 / Sum_{k=0..n} (k+7)!*x^k)^(1/4).
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3
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1, -2, -8, -60, -600, -7152, -96456, -1430544, -22933920, -393013280, -7144207808, -137001926144, -2760226854816, -58242464679360, -1283886660610560, -29506641823939200, -705788634473952000, -17544801385483584000, -452659831142363014400
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OFFSET
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0,2
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LINKS
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MAPLE
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[seq(coeff(series((factorial(7)/add(factorial(k+7)*x^k, k=0..n))^(1/4), x, 30), x, n), n=0..25)]; # Muniru A Asiru, Apr 29 2018
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PROG
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(PARI) N=66; x='x+O('x^N); Vec((7!/sum(k=0, N, (k+7)!*x^k))^(1/4))
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CROSSREFS
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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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