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A058649
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a(n) = 2^(n-4)*n*(n+1)*(n^2+5*n-2).
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5
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0, 1, 18, 132, 680, 2880, 10752, 36736, 117504, 357120, 1041920, 2939904, 8067072, 21618688, 56770560, 146472960, 372113408, 932511744, 2308571136, 5653135360, 13707509760, 32942063616, 78525759488, 185799278592, 436627046400
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OFFSET
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0,3
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COMMENTS
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REFERENCES
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A. P. Prudnikov, Yu. A. Brychkov and O.I. Marichev, "Integrals and Series", Volume 1: "Elementary Functions", Chapter 4: "Finite Sums", New York, Gordon and Breach Science Publishers, 1986-1992.
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LINKS
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FORMULA
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a(n) = Sum_{i=1..n} i^4 * binomial(n, i).
G.f.: x*(8*x^2-8*x-1)/(2*x-1)^5. - Maksym Voznyy (voznyy(AT)mail.ru), Jul 26 2009
a(n) = 10*a(n-1)-40*a(n-2)+80*a(n-3)-80*a(n-4)+32*a(n-5). - Wesley Ivan Hurt, Dec 24 2021
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MATHEMATICA
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LinearRecurrence[{10, -40, 80, -80, 32}, {0, 1, 18, 132, 680}, 30] (* Wesley Ivan Hurt, Dec 24 2021 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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Yong Kong (ykong(AT)curagen.com), Dec 26 2000
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STATUS
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approved
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