A044950 Number of runs of odd length in the base 10 representation of n.

1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2

Offset

1,10

Links

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

Formula

a(n) = A043562(n) - A044941(n). - Paolo Xausa, Oct 24 2025

Mathematica

A044950[n_] := Count[Map[Length, Split[IntegerDigits[n]]], _?OddQ];
Array[A044950, 100] (* Paolo Xausa, Oct 24 2025 *)

Crossrefs

Cf. A044942-A044949, A043562, A044941.

Sequence in context: A044947 A044948 A044949 * A161872 A278248 A036461

Adjacent sequences: A044947 A044948 A044949 * A044951 A044952 A044953

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved