A043713 Numbers whose base-10 representation has an odd number of runs.

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 102, 103, 104, 105, 106, 107, 108, 109, 111, 120, 121, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154

Offset

1,2

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

Mathematica

A043713Q[k_] := OddQ[Length[Split[IntegerDigits[k]]]];
Select[Range[200], A043713Q] (* Paolo Xausa, Oct 27 2025 *)

Crossrefs

Sequence in context: A297148 A044821 A048307 * A296712 A276115 A342826

Adjacent sequences: A043710 A043711 A043712 * A043714 A043715 A043716

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Oct 27 2025

Status

approved