A063621 Smallest k such that 8^k has exactly n 5's in its decimal representation.

1, 3, 11, 13, 19, 23, 48, 36, 72, 86, 66, 67, 70, 103, 136, 123, 160, 106, 180, 154, 104, 187, 147, 211, 218, 212, 232, 255, 268, 250, 247, 230, 299, 269, 209, 331, 308, 289, 356, 345, 347, 367, 428, 393, 466, 360, 385, 493, 484, 476, 404

Offset

0,2

Links

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

Mathematica

a = {}; Do[k = 1; While[ Count[ IntegerDigits[8^k], 5] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a

Crossrefs

Sequence in context: A373471 A103835 A067386 * A176870 A089152 A066594

Adjacent sequences: A063618 A063619 A063620 * A063622 A063623 A063624

Keyword

base,nonn

Author

Robert G. Wilson v, Aug 10 2001

Extensions

Name corrected by Jon E. Schoenfield, Jun 26 2018

Status

approved