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A371882
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a(n) = Sum_{k=0..n} binomial(n,k)^7 * (1 - 7*k*(H(k) - H(n-k))), where H(n) is the n-th harmonic number.
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1
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1, -5, 109, -3317, 121501, -4954505, 216867925, -9981053045, 476860000285, -23451310381505, 1180189308268609, -60519806861966105, 3152285573768063461, -166371462775232899553, 8880340127444426907109, -478649327347386225075317
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OFFSET
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0,2
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LINKS
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PROG
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(PARI) h(n) = sum(k=1, n, 1/k);
a(n, l=7) = sum(k=0, n, binomial(n, k)^l*(1-l*k*(h(k)-h(n-k))));
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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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