A045019 Numbers whose base-4 representation contains exactly one 0 and one 1.

4, 18, 19, 24, 28, 33, 36, 49, 52, 74, 75, 78, 79, 98, 99, 104, 108, 114, 115, 120, 124, 134, 135, 137, 141, 146, 147, 152, 156, 161, 164, 177, 180, 198, 199, 201, 205, 210, 211, 216, 220, 225, 228, 241, 244, 298, 299, 302, 303

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Mathematica

Select[Range[350], DigitCount[#, 4, 0]==DigitCount[#, 4, 1]==1&] (* Harvey P. Dale, Jun 15 2011 *)

Crossrefs

Cf. A007090.

Sequence in context: A275952 A081420 A039277 * A103061 A230605 A201880

Adjacent sequences: A045016 A045017 A045018 * A045020 A045021 A045022

Keyword

nonn,base

Author

Clark Kimberling

Status

approved