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A017263
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a(n) = (9*n + 8)^7.
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1
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2097152, 410338673, 8031810176, 64339296875, 319277809664, 1174711139837, 3521614606208, 9095120158391, 20971520000000, 44231334895529, 86812553324672, 160578147647843, 282621973446656, 476837158203125, 775771085481344, 1222791080775407, 1874584905187328
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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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a(n) = 8*a(n-1) - 28*a(n-2) + 56*a(n-3) - 70*a(n-4) + 56*a(n-5) - 28*a(n-6) + 8*a(n-7) - a(n-8); a(0)=2097152, a(1)=410338673, a(2)=8031810176, a(3)=64339296875, a(4)=319277809664, a(5)=1174711139837, a(6)=3521614606208, a(7)=9095120158391. - Harvey P. Dale, Apr 06 2013
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MATHEMATICA
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(9*Range[0, 20]+8)^7 (* or *) LinearRecurrence[{8, -28, 56, -70, 56, -28, 8, -1}, {2097152, 410338673, 8031810176, 64339296875, 319277809664, 1174711139837, 3521614606208, 9095120158391}, 30] (* Harvey P. Dale, Apr 06 2013 *)
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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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EXTENSIONS
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STATUS
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approved
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