A045014 Numbers whose base-4 representation contains no 0's and exactly one 1.

1, 6, 7, 9, 13, 26, 27, 30, 31, 38, 39, 41, 45, 54, 55, 57, 61, 106, 107, 110, 111, 122, 123, 126, 127, 154, 155, 158, 159, 166, 167, 169, 173, 182, 183, 185, 189, 218, 219, 222, 223, 230, 231, 233, 237, 246, 247, 249, 253, 426, 427

Offset

1,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1900

Mathematica

Select[Range[700], DigitCount[#, 4, 0] == 0 && DigitCount[#, 4, 1] == 1 &] (* Vincenzo Librandi, Sep 21 2016 *)

Crossrefs

Cf. A007090.

Sequence in context: A376243 A049304 A168614 * A047591 A340765 A239869

Adjacent sequences: A045011 A045012 A045013 * A045015 A045016 A045017

Keyword

nonn,base

Author

Clark Kimberling

Status

approved