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 A063617 Smallest k such that 8^k has exactly n 1's in its decimal representation. 0
 1, 3, 8, 14, 19, 28, 39, 38, 51, 76, 69, 65, 95, 56, 107, 115, 130, 124, 180, 171, 168, 160, 186, 193, 199, 169, 207, 216, 200, 223, 192, 282, 285, 240, 278, 322, 298, 317, 331, 309, 315, 343, 311, 416, 378, 430, 403, 402, 454, 441, 376 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..50. MATHEMATICA a = {}; Do[k = 1; While[ Count[ IntegerDigits[8^k], 1] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a Join[{1, 3}, Module[{nn=500, p8}, p8=Table[{n, 8^n}, {n, 0, nn}]; Table[SelectFirst[ p8, DigitCount[#[[2]], 10, 1]==x&], {x, 2, 50}]][[All, 1]]] (* Harvey P. Dale, Sep 06 2022 *) CROSSREFS Sequence in context: A184517 A028252 A299647 * A062550 A219930 A333962 Adjacent sequences: A063614 A063615 A063616 * A063618 A063619 A063620 KEYWORD base,nonn AUTHOR Robert G. Wilson v, Aug 10 2001 EXTENSIONS Name corrected by Jon E. Schoenfield, Jun 26 2018 STATUS approved

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Last modified August 8 09:31 EDT 2024. Contains 375018 sequences. (Running on oeis4.)