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
Programs
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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