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A139817
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2^n - number of digits of 2^n.
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0
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0, 1, 3, 7, 14, 30, 62, 125, 253, 509, 1020, 2044, 4092, 8188, 16379, 32763, 65531, 131066, 262138, 524282, 1048569, 2097145, 4194297, 8388601, 16777208, 33554424, 67108856, 134217719, 268435447, 536870903, 1073741814, 2147483638, 4294967286, 8589934582
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OFFSET
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0,3
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LINKS
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FORMULA
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MATHEMATICA
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Table[2^n-IntegerLength[2^n], {n, 0, 40}] (* Harvey P. Dale, Apr 05 2015 *)
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PROG
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(PARI) a(n) = 2^n - length(digits(2^n)) \\ Michel Marcus, Jul 18 2013
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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