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A016962
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a(n) = (6*n + 4)^6.
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7
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4096, 1000000, 16777216, 113379904, 481890304, 1544804416, 4096000000, 9474296896, 19770609664, 38068692544, 68719476736, 117649000000, 192699928576, 304006671424, 464404086784, 689869781056, 1000000000000, 1418519112256, 1973822685184, 2699554153024, 3635215077376
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internal format)
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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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Sum_{n>=0} 1/a(n) = PolyGamma(5, 2/3)/5598720. (End)
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MATHEMATICA
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(6Range[0, 20]+4)^6 (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {4096, 1000000, 16777216, 113379904, 481890304, 1544804416, 4096000000}, 20] (* Harvey P. Dale, Aug 08 2019 *)
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PROG
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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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