A048842 Least positive integer k for which 13^n divides k!.

1, 13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 156, 169, 169, 182, 195, 208, 221, 234, 247, 260, 273, 286, 299, 312, 325, 338, 338, 351, 364, 377, 390, 403, 416, 429, 442, 455, 468, 481, 494, 507, 507, 520, 533, 546, 559, 572, 585, 598

Offset: 0

Author

Charles T. Le (charlestle(AT)yahoo.com)

Keywords

• nonn

Links

• T. D. Noe, Table of n, a(n) for n = 0..1000

Crossrefs

See A007843 for more information.

Programs

PARI

a(n) = {k = 1; ok = 0; until (ok, if (k! % 13^n == 0, ok=1, k++);); return (k);} \\ Michel Marcus, Jun 30 2013