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A045221
Numbers whose base-5 representation contains exactly one 1 and no 2's.
0
1, 5, 8, 9, 16, 21, 25, 28, 29, 40, 43, 44, 45, 48, 49, 76, 80, 83, 84, 91, 96, 101, 105, 108, 109, 116, 121, 125, 128, 129, 140, 143, 144, 145, 148, 149, 200, 203, 204, 215, 218, 219, 220, 223, 224, 225, 228, 229, 240, 243, 244, 245
OFFSET
1,2
MATHEMATICA
Select[Range[250], DigitCount[#, 5, 1]==1&&DigitCount[#, 5, 2]==0&] (* Harvey P. Dale, Dec 26 2021 *)
CROSSREFS
Cf. A007091.
Sequence in context: A375713 A231065 A314576 * A046287 A051220 A102785
KEYWORD
nonn,base
STATUS
approved