A045177 Numbers whose base-5 representation contains exactly one 0 and one 2.

10, 27, 35, 51, 53, 54, 55, 65, 70, 77, 85, 102, 110, 132, 136, 138, 139, 142, 147, 152, 160, 176, 178, 179, 180, 190, 195, 202, 210, 227, 235, 256, 258, 259, 266, 268, 269, 271, 273, 274, 276, 278, 279, 280, 290, 295, 326, 328, 329, 330, 340, 345, 351, 353

Offset

1,1

Links

Table of n, a(n) for n=1..54.

Prog

(Python)
from sympy.ntheory import count_digits
def ok(n): c = count_digits(n, b=5); return c[0] == c[2] == 1
print([k for k in range(354) if ok(k)]) # Michael S. Branicky, Oct 27 2021

Crossrefs

Cf. A007091.

Subsequence of A039284.

Sequence in context: A024168 A043107 A039284 * A043887 A161450 A361473

Adjacent sequences: A045174 A045175 A045176 * A045178 A045179 A045180

Keyword

nonn,base

Author

Clark Kimberling

Status

approved