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A016855
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a(n) = (5*n)^7.
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1
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0, 78125, 10000000, 170859375, 1280000000, 6103515625, 21870000000, 64339296875, 163840000000, 373669453125, 781250000000, 1522435234375, 2799360000000, 4902227890625, 8235430000000, 13348388671875
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OFFSET
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0,2
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LINKS
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FORMULA
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a(0)=0, a(1)=78125, a(2)=10000000, a(3)=170859375, a(4)=1280000000, a(5)=6103515625, a(6)=21870000000, a(7)=64339296875, 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). - Harvey P. Dale, May 07 2013
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MATHEMATICA
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(5*Range[0, 20])^7 (* or *) LinearRecurrence[{8, -28, 56, -70, 56, -28, 8, -1}, {0, 78125, 10000000, 170859375, 1280000000, 6103515625, 21870000000, 64339296875}, 20] (* Harvey P. Dale, May 07 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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STATUS
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approved
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