A043708 Numbers whose base-5 representation has an odd number of runs.

1, 2, 3, 4, 6, 12, 18, 24, 26, 27, 28, 29, 31, 35, 36, 38, 39, 40, 41, 42, 44, 45, 46, 47, 48, 51, 52, 53, 54, 55, 57, 58, 59, 62, 65, 66, 67, 69, 70, 71, 72, 73, 76, 77, 78, 79, 80, 82, 83, 84, 85, 86, 88, 89, 93, 95, 96, 97, 98, 101, 102, 103, 104, 105, 107, 108, 109, 110

Offset

1,2

Links

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

Mathematica

A043708Q[k_] := OddQ[Length[Split[IntegerDigits[k, 5]]]];
Select[Range[150], A043708Q] (* Paolo Xausa, Oct 27 2025 *)

Crossrefs

Cf. A007091.

Sequence in context: A297133 A044816 A048302 * A296697 A297256 A029952

Adjacent sequences: A043705 A043706 A043707 * A043709 A043710 A043711

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Oct 27 2025

Status

approved