A063590 Smallest k such that 5^k has exactly n 5's in its decimal representation.

1, 6, 14, 27, 30, 41, 65, 66, 54, 83, 73, 109, 102, 112, 118, 106, 187, 159, 175, 204, 209, 174, 222, 278, 234, 327, 266, 300, 369, 318, 310, 339, 350, 377, 301, 357, 426, 411, 446, 421, 434, 452, 490, 525, 494, 521, 554, 543, 514, 503

Offset

1,2

Links

Table of n, a(n) for n=1..50.

Mathematica

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

Crossrefs

Sequence in context: A093776 A107317 A071776 * A349723 A128806 A139596

Adjacent sequences: A063587 A063588 A063589 * A063591 A063592 A063593

Keyword

base,nonn

Author

Robert G. Wilson v, Aug 10 2001

Extensions

Name corrected by Jon E. Schoenfield, Jun 26 2018

Status

approved