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A083585
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(8*5^n - 5*2^n)/3.
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2
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1, 10, 60, 320, 1640, 8280, 41560, 208120, 1041240, 5207480, 26039960, 130204920, 651034840, 3255194680, 16276014360, 81380153720, 406900932440, 2034504989880, 10172525604760, 50862629334520, 254313149294040
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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a(n) = (8*5^n-5*2^n)/3.
G.f. (1+3x)/((1-2x)(1-5x)).
E.g.f. (8*exp(5x) - 5*exp(2x))/3.
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MATHEMATICA
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LinearRecurrence[{7, -10}, {1, 10}, 20] (* T. D. Noe, Aug 06 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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