A043700 Numbers whose base-11 representation has an even number of runs.

11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 85, 86

Offset

1,1

Links

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

Mathematica

A043700Q[k_] := EvenQ[Length[Split[IntegerDigits[k, 11]]]];
Select[Range[100], A043700Q] (* Paolo Xausa, Oct 27 2025 *)

Crossrefs

Sequence in context: A128509 A240468 A043645 * A111634 A065877 A393966

Adjacent sequences: A043697 A043698 A043699 * A043701 A043702 A043703

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Oct 27 2025

Status

approved