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A013735
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a(n) = 4^(3*n+2).
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4
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16, 1024, 65536, 4194304, 268435456, 17179869184, 1099511627776, 70368744177664, 4503599627370496, 288230376151711744, 18446744073709551616, 1180591620717411303424, 75557863725914323419136, 4835703278458516698824704
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OFFSET
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0,1
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COMMENTS
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Additive digital root of a(n) = 7. - Miquel Cerda, Jul 03 2016
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LINKS
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FORMULA
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E.g.f.: 16*exp(64*x).
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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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