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A090453
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Third column (m=4) of array A090452.
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3
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2, 16, 51, 118, 230, 402, 651, 996, 1458, 2060, 2827, 3786, 4966, 6398, 8115, 10152, 12546, 15336, 18563, 22270, 26502, 31306, 36731, 42828, 49650, 57252, 65691, 75026, 85318, 96630, 109027, 122576, 137346, 153408, 170835, 189702, 210086
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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)= (n+1)*(n^3+15*n^2+56*n+24)/12.
G.f.: (2+6*x-9*x^2+3*x^3)/(1-x)^5.
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MATHEMATICA
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Table[(n+1)(n^3+15n^2+56n+24)/12, {n, 0, 40}] (* or *) LinearRecurrence[{5, -10, 10, -5, 1}, {2, 16, 51, 118, 230}, 40] (* Harvey P. Dale, Dec 07 2014 *)
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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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