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A013720
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a(n) = 15^(2*n + 1).
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2
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15, 3375, 759375, 170859375, 38443359375, 8649755859375, 1946195068359375, 437893890380859375, 98526125335693359375, 22168378200531005859375, 4987885095119476318359375, 1122274146401882171630859375
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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) = 225*a(n-1), a(0)=15.
G.f.: 15/(1-225*x). (End)
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MAPLE
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MATHEMATICA
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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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