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A091903
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Expansion of x/((1+5x)(1-10x)).
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3
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0, 1, 5, 75, 625, 6875, 65625, 671875, 6640625, 66796875, 666015625, 6669921875, 66650390625, 666748046875, 6666259765625, 66668701171875, 666656494140625, 6666717529296875, 66666412353515625, 666667938232421875
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OFFSET
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0,3
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COMMENTS
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a(n)=A091883(n+1)/50; a(n)/a(n+1)->1/10.
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LINKS
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FORMULA
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a(n)=10^n/15-(-5)^n/15
a(0)=0, a(1)=1, a(n)=5*a(n-1)+50*a(n-2). - Harvey P. Dale, Mar 13 2013
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MATHEMATICA
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CoefficientList[Series[x/((1+5x)(1-10x)), {x, 0, 30}], x] (* or *) LinearRecurrence[ {5, 50}, {0, 1}, 30] (* Harvey P. Dale, Mar 13 2013 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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