A043572 Numbers whose base-2 representation has exactly 5 runs.

21, 37, 41, 43, 45, 53, 69, 73, 75, 77, 81, 83, 87, 89, 91, 93, 101, 105, 107, 109, 117, 133, 137, 139, 141, 145, 147, 151, 153, 155, 157, 161, 163, 167, 175, 177, 179, 183, 185, 187, 189, 197, 201, 203, 205, 209, 211, 215, 217

Offset

1,1

Links

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

Mathematica

Select[Range[300], Length[Split[IntegerDigits[#, 2]]]==5&] (* Harvey P. Dale, Sep 15 2022 *)

Crossrefs

Sequence in context: A067598 A043683 A173589 * A043728 A043738 A043744

Adjacent sequences: A043569 A043570 A043571 * A043573 A043574 A043575

Keyword

nonn,base

Author

Clark Kimberling

Status

approved