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A060558
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Fifth column (m=4) of triangle A060556.
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3
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5, 55, 316, 1284, 4170, 11550, 28380, 63492, 131703, 256685, 474760, 839800, 1429428, 2352732, 3759720, 5852760, 8900265, 13252899, 19362596, 27804700, 39303550, 54761850, 75294180, 102265020
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OFFSET
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0,1
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LINKS
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FORMULA
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a(n) = (2*n^2 + 18*n + 35)*binomial(n+6, 6)/7.
G.f.: (5 + 10*x + x^2)/(1-x)^9.
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PROG
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(PARI) a(n)={(2*n^2 + 18*n + 35)*binomial(n + 6, 6)/7} \\ Harry J. Smith, Jul 07 2009
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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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STATUS
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approved
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