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A043702
Numbers whose base-13 representation has an even number of runs.
3
13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77
OFFSET
1,1
MATHEMATICA
Select[Range[100], EvenQ[Length[Split[IntegerDigits[#, 13]]]]&] (* Harvey P. Dale, Aug 22 2015 *)
CROSSREFS
Sequence in context: A229957 A070640 A043657 * A278978 A212908 A180642
KEYWORD
nonn,base
STATUS
approved