A043710 Numbers whose base-7 representation has an odd number of runs.

1, 2, 3, 4, 5, 6, 8, 16, 24, 32, 40, 48, 50, 51, 52, 53, 54, 55, 57, 63, 64, 66, 67, 68, 69, 70, 71, 72, 74, 75, 76, 77, 78, 79, 80, 82, 83, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 99, 100, 101, 102, 103, 104, 105, 107, 108, 109, 110

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Mathematica

Select[Range[120], OddQ[Length[Split[IntegerDigits[#, 7]]]]&] (* Harvey P. Dale, Sep 10 2024 *)

Crossrefs

Sequence in context: A297139 A044818 A048304 * A296703 A297262 A029954

Adjacent sequences: A043707 A043708 A043709 * A043711 A043712 A043713

Keyword

nonn,base

Author

Clark Kimberling

Status

approved