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A063945
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Number of nonnegative integers with n digits.
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4
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10, 90, 900, 9000, 90000, 900000, 9000000, 90000000, 900000000, 9000000000, 90000000000, 900000000000, 9000000000000, 90000000000000, 900000000000000, 9000000000000000, 90000000000000000, 900000000000000000, 9000000000000000000, 90000000000000000000
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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a(1) = 10, a(2) = 90, a(n) = a(n-1)*10 for n>2.
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MAPLE
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a:= n-> `if`(n=1, 10, 9*10^(n-1)):
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MATHEMATICA
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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STATUS
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approved
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