A043594 Numbers whose base-4 representation has exactly 3 runs.

17, 18, 19, 24, 25, 27, 28, 29, 30, 33, 34, 35, 36, 38, 39, 44, 45, 46, 49, 50, 51, 52, 54, 55, 56, 57, 59, 65, 66, 67, 69, 74, 79, 81, 82, 83, 88, 89, 91, 92, 93, 94, 96, 101, 104, 105, 107, 111, 112, 117, 122, 124, 125, 126, 129, 130

Offset

1,1

Links

Table of n, a(n) for n=1..56.

Mathematica

Select[Range[200], Length[Split[IntegerDigits[#, 4]]]==3&] (* Harvey P. Dale, May 29 2019 *)

Crossrefs

Cf. A007090.

Sequence in context: A297287 A018822 A304488 * A043825 A043831 A043835

Adjacent sequences: A043591 A043592 A043593 * A043595 A043596 A043597

Keyword

nonn,base

Author

Clark Kimberling

Status

approved