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A017619
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a(n) = (12*n + 8)^3.
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1
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512, 8000, 32768, 85184, 175616, 314432, 512000, 778688, 1124864, 1560896, 2097152, 2744000, 3511808, 4410944, 5451776, 6644672, 8000000, 9528128, 11239424, 13144256, 15252992, 17576000, 20123648
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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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G.f.: 64*(8 + 93*x + 60*x^2 + x^3)/(-1+x)^4.
a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4); a(0)=512, a(1)=8000, a(2)=32768, a(3)=85184. - Harvey P. Dale, Dec 14 2015
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MATHEMATICA
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(12*Range[0, 30]+8)^3 (* or *) LinearRecurrence[{4, -6, 4, -1}, {512, 8000, 32768, 85184}, 30] (* Harvey P. Dale, Dec 14 2015 *)
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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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