A043706 Numbers whose base-3 representation has an odd number of runs.

1, 2, 4, 8, 10, 11, 13, 15, 16, 19, 20, 21, 23, 26, 28, 29, 31, 35, 37, 38, 40, 42, 43, 45, 49, 51, 52, 55, 56, 58, 62, 63, 66, 68, 71, 73, 74, 75, 77, 80, 82, 83, 85, 89, 91, 92, 94, 96, 97, 100, 101, 102, 104, 107, 109, 110, 112, 116, 118

Offset

1,2

Links

Table of n, a(n) for n=1..59.

Mathematica

Select[Range[200], OddQ[Length[Split[IntegerDigits[#, 3]]]]&] (* Harvey P. Dale, Mar 05 2020 *)

Crossrefs

Sequence in context: A153181 A256624 A247324 * A296691 A028836 A028838

Adjacent sequences: A043703 A043704 A043705 * A043707 A043708 A043709

Keyword

nonn,base

Author

Clark Kimberling

Status

approved