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 A139817 2^n - number of digits of 2^n. 0
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA a(n) = A000079(n) - A055642(A000079(n)). - Michel Marcus, Jul 18 2013 MATHEMATICA Table[2^n-IntegerLength[2^n], {n, 0, 40}] (* Harvey P. Dale, Apr 05 2015 *) PROG (PARI) a(n) = 2^n - length(digits(2^n)) \\ Michel Marcus, Jul 18 2013 CROSSREFS Cf. A000079, A055642. Sequence in context: A265381 A066225 A305777 * A173010 A036892 A123707 Adjacent sequences:  A139814 A139815 A139816 * A139818 A139819 A139820 KEYWORD nonn,base AUTHOR Rolf Pleisch, May 23 2008 EXTENSIONS More terms from N. J. A. Sloane, Jun 29 2008 STATUS approved

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Last modified August 14 01:20 EDT 2020. Contains 336473 sequences. (Running on oeis4.)