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A163276
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a(n) = n^6*(n+1)^2/2.
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3
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0, 2, 288, 5832, 51200, 281250, 1143072, 3764768, 10616832, 26572050, 60500000, 127552392, 252315648, 473027282, 847072800, 1458000000, 2424307712, 3910286178, 6139206432, 9409176200, 14112000000, 20755401282, 29988984608
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..22.
Index to sequences with linear recurrences with constant coefficients, signature (9,-36,84,-126,126,-84,36,-9,1).
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FORMULA
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G.f.: 2*x*(1+135*x+1656*x^2+4456*x^3+3231*x^4+585*x^5+16*x^6)/(1-x)^9. [Colin Barker, May 05 2012]
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MAPLE
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seq((1/2)*n^6*(n+1)^2, n = 0 .. 25); [From Emeric Deutsch, Aug 01 2009]
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CROSSREFS
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Cf. A006002, A099903, A163102, A163274, A163275, A163277.
Sequence in context: A172374 A080296 A182519 * A065498 A203771 A057746
Adjacent sequences: A163273 A163274 A163275 * A163277 A163278 A163279
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol, Jul 24 2009
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EXTENSIONS
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Extended by Emeric Deutsch, Aug 01 2009
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STATUS
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approved
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