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A043572
Numbers whose base-2 representation has exactly 5 runs.
0
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
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
KEYWORD
nonn,base
STATUS
approved