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A165679
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Seventh right hand column of triangle A165674
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4
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13068, 69264, 241128, 662640, 1557660, 3272688, 6314664, 11393808, 19471500, 31813200, 50046408, 76223664, 112890588, 163158960, 230784840, 320251728, 436858764, 586813968, 777332520, 1016740080, 1314581148, 1681732464
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OFFSET
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1,1
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COMMENTS
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The recurrence relation leads to Pascal's triangle A007318, the a(n) formula to Wiggen's triangle A028421 and the o.g.f to Wood's polynomials A126671; see A165674.
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LINKS
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FORMULA
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a(n) = 7*a(n-1) - 21*a(n-2) + 35*a(n-3) - 35*a(n-4) + 21*a(n-5) - 7* a(n-6) + a(n-7)
a(n) = 720 + 3528*n + 4872*n^2 + 2940*n^3 + 875*n^4 + 126*n^5 +7*n^6
Gf(z) = (0*z^8 - 720*z^7 + 5160*z^6 - 16008*z^5 + 28092*z^4 - 30708*z^3 + 22212*z^2 - 13068*z)/(z-1)^7
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MATHEMATICA
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LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {13068, 69264, 241128, 662640, 1557660, 3272688, 6314664}, 30] (* Harvey P. Dale, Aug 24 2012 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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