A044332 Numbers k such that the string 0,0 occurs in the base 10 representation of k but not of k-1.

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500, 2600, 2700, 2800, 2900, 3000, 3100, 3200, 3300, 3400, 3500, 3600, 3700, 3800, 3900, 4000, 4100, 4200, 4300, 4400, 4500, 4600, 4700

Offset

1,1

Comments

Every element is a multiple of 100. The smallest positive multiple of 100 not in the sequence is 10100. - David W. Wilson, Aug 03 2005

Links

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

Tanya Khovanova, Non Recursions

Mathematica

A044332Q[k_] := StringContainsQ[IntegerString[k], "00"] && StringFreeQ[IntegerString[k - 1], "00"];
Select[Range[100, 5000, 100], A044332Q] (* Paolo Xausa, Nov 03 2025 *)

Crossrefs

Sequence in context: A262198 A292450 A166731 * A292730 A043490 A218037

Adjacent sequences: A044329 A044330 A044331 * A044333 A044334 A044335

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Nov 03 2025

Status

approved