A043694 Numbers whose base-5 representation has an even number of runs.

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

Links

Table of n, a(n) for n=1..57.

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

Adjacent sequences: A043691 A043692 A043693 * A043695 A043696 A043697

Keyword

nonn,base

Author

Clark Kimberling

Status

approved