A044335 Numbers k such that the string 0,3 occurs in the base 10 representation of k but not of k-1.

103, 203, 303, 403, 503, 603, 703, 803, 903, 1003, 1030, 1103, 1203, 1303, 1403, 1503, 1603, 1703, 1803, 1903, 2003, 2030, 2103, 2203, 2303, 2403, 2503, 2603, 2703, 2803, 2903, 3003, 3030, 3103, 3203, 3303, 3403, 3503, 3603, 3703, 3803, 3903, 4003, 4030, 4103, 4203, 4303

Offset

1,1

Links

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

Mathematica

A044335Q[k_] := StringContainsQ[IntegerString[k], "03"] && StringFreeQ[IntegerString[k - 1], "03"];
Select[Range[5000], A044335Q] (* Paolo Xausa, Nov 03 2025 *)

Crossrefs

Sequence in context: A142174 A265497 A142360 * A044716 A260470 A134551

Adjacent sequences: A044332 A044333 A044334 * A044336 A044337 A044338

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Nov 03 2025

Status

approved