A043716 Numbers whose base-13 representation has an odd number of runs.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 28, 42, 56, 70, 84, 98, 112, 126, 140, 154, 168, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 183, 195, 196, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Programs

Mathematica

Select[Range[250],OddQ[Length[Split[IntegerDigits[#,13]]]]&] (* Harvey P. Dale, Jan 31 2016 *)