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A013744
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a(n) = 9^(3*n + 1).
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1
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9, 6561, 4782969, 3486784401, 2541865828329, 1853020188851841, 1350851717672992089, 984770902183611232881, 717897987691852588770249, 523347633027360537213511521, 381520424476945831628649898809
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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) = 729*a(n-1); a(0)=9.
G.f.: 9/(1-729*x). (End)
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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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