A063560 Smallest k such that 3^k has exactly n 5's in its decimal representation.

1, 8, 26, 35, 40, 39, 71, 70, 33, 111, 109, 129, 161, 151, 213, 273, 246, 281, 304, 241, 293, 321, 312, 363, 364, 376, 444, 450, 474, 400, 561, 565, 494, 576, 544, 537, 556, 581, 637, 625, 689, 726, 538, 624, 725, 799, 744, 814, 727, 888, 819

Offset

0,2

Links

Table of n, a(n) for n=0..50.

Mathematica

a = {}; Do[k = 1; While[ Count[ IntegerDigits[3^k], 5] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a

Crossrefs

Sequence in context: A200785 A120743 A345205 * A265104 A328205 A304910

Adjacent sequences: A063557 A063558 A063559 * A063561 A063562 A063563

Keyword

base,nonn

Author

Robert G. Wilson v, Aug 10 2001

Extensions

Name corrected by Jon E. Schoenfield, Jun 26 2018

Status

approved