A045157 Numbers whose base-4 representation contains exactly four 2's and four 3's.

43775, 43967, 44015, 44027, 44030, 44735, 44783, 44795, 44798, 44975, 44987, 44990, 45035, 45038, 45050, 47807, 47855, 47867, 47870, 48047, 48059, 48062, 48107, 48110, 48122, 48815, 48827, 48830, 48875, 48878

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Mathematica

Select[Range[50000], Rest[Most[DigitCount[#, 4]]]=={4, 4}&]  (* Harvey P. Dale, Feb 05 2011 *)

Crossrefs

Cf. A007090.

Sequence in context: A165479 A140931 A295440 * A206517 A279892 A037147

Adjacent sequences: A045154 A045155 A045156 * A045158 A045159 A045160

Keyword

nonn,base

Author

Clark Kimberling

Status

approved