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A063559
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Smallest k such that 3^k has exactly n 4's in its decimal representation.
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0
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1, 5, 12, 20, 59, 58, 86, 63, 72, 139, 125, 159, 136, 211, 204, 170, 196, 197, 271, 302, 218, 308, 344, 392, 309, 351, 434, 488, 490, 414, 529, 452, 484, 523, 538, 526, 594, 522, 605, 592, 705, 670, 649, 672, 771, 785, 691, 819, 788, 887, 808
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internal format)
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..50.
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MATHEMATICA
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a = {}; Do[k = 1; While[ Count[ IntegerDigits[3^k], 4] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a
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CROSSREFS
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Sequence in context: A270079 A266937 A270214 * A259913 A224824 A121291
Adjacent sequences: A063556 A063557 A063558 * A063560 A063561 A063562
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v, Aug 10 2001
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EXTENSIONS
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Name corrected by Jon E. Schoenfield, Jun 26 2018
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STATUS
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approved
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