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A043694
Numbers whose base-5 representation has an even number of runs.
3
5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 30, 32, 33, 34, 37, 43, 49, 50, 56, 60, 61, 63, 64, 68, 74, 75, 81, 87, 90, 91, 92, 94, 99, 100, 106, 112, 118, 120, 121, 122, 123, 125, 130, 132, 133, 134, 135, 136, 138, 139
OFFSET
1,1
MATHEMATICA
Select[Range[150], EvenQ[Length[Split[IntegerDigits[#, 5]]]]&] (* Harvey P. Dale, May 14 2023 *)
CROSSREFS
Sequence in context: A065966 A096989 A031950 * A043602 A243624 A038609
KEYWORD
nonn,base
STATUS
approved