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A274077
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a(n) = n^3 + 4.
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1
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4, 5, 12, 31, 68, 129, 220, 347, 516, 733, 1004, 1335, 1732, 2201, 2748, 3379, 4100, 4917, 5836, 6863, 8004, 9265, 10652, 12171, 13828, 15629, 17580, 19687, 21956, 24393, 27004, 29795, 32772, 35941, 39308, 42879, 46660, 50657, 54876, 59323, 64004, 68925
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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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O.g.f.: (4 - 11*x + 16*x^2 - 3*x^3)/(1 - x)^4.
E.g.f.: (x^3 + 3*x^2 + x + 4)*exp(x). - Robert Israel, Jun 09 2016
a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4).
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MAPLE
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MATHEMATICA
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Table[n^3 + 4, {n, 0, 60}]
Range[0, 50]^3+4 (* or *) LinearRecurrence[{4, -6, 4, -1}, {4, 5, 12, 31}, 50] (* Harvey P. Dale, Jul 01 2017 *)
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PROG
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(Magma) [n^3+4: n in [0..50]];
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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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