

A063612


Smallest k such that 7^k has exactly n 6's in its decimal representation.


0



1, 5, 16, 20, 28, 25, 34, 44, 56, 53, 81, 70, 92, 111, 160, 124, 142, 135, 189, 183, 168, 224, 228, 211, 225, 266, 240, 215, 253, 246, 236, 311, 338, 247, 302, 307, 242, 386, 365, 371, 441, 426, 325, 370, 433, 458, 478, 430, 425, 408, 483
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OFFSET

0,2


LINKS



MATHEMATICA

a = {}; Do[k = 1; While[ Count[ IntegerDigits[7^k], 6] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a


CROSSREFS



KEYWORD

base,nonn


AUTHOR



EXTENSIONS



STATUS

approved



