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A043710
Numbers whose base-7 representation has an odd number of runs.
2
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
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
KEYWORD
nonn,base
STATUS
approved