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A063563
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Smallest k such that 3^k has exactly n 8's in its decimal representation.
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1
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1, 4, 18, 25, 44, 32, 47, 69, 102, 118, 98, 163, 201, 139, 225, 230, 209, 271, 280, 318, 287, 304, 290, 331, 369, 361, 429, 375, 446, 378, 533, 513, 504, 410, 551, 481, 571, 635, 568, 580, 610, 648, 713, 704, 720, 753, 689, 923, 829, 806, 839
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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a = {}; Do[k = 1; While[ Count[ IntegerDigits[3^k], 8] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a
With[{t=3^Range[1000]}, Table[Position[t, _?(DigitCount[#, 10, 8]==n&), 1, 1], {n, 0, 50}]]//Flatten (* Harvey P. Dale, Jul 10 2017 *)
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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