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A175604
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a(n) = 8*(10^n-7).
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1
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24, 744, 7944, 79944, 799944, 7999944, 79999944, 799999944, 7999999944, 79999999944, 799999999944, 7999999999944, 79999999999944, 799999999999944, 7999999999999944, 79999999999999944, 799999999999999944
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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Table[8 (10^n - 7), {n, 20}] (* or *) CoefficientList[Series[8 (3 + 60 x)/((1 - x) (1 - 10 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Aug 24 2014 *)
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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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