A044095 Numbers k such that string 3,3 occurs in the base 5 representation of k but not of k-1.

18, 43, 68, 90, 118, 143, 168, 193, 215, 243, 268, 293, 318, 340, 368, 393, 418, 443, 450, 493, 518, 543, 568, 590, 618, 643, 668, 693, 715, 743, 768, 793, 818, 840, 868, 893, 918, 943, 965, 993, 1018, 1043, 1068, 1075, 1118, 1143, 1168, 1193, 1215, 1243, 1268, 1293

Offset

1,1

Links

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

Mathematica

A044095Q[k_] := StringContainsQ[IntegerString[k, 5], "33"] && StringFreeQ[IntegerString[k - 1, 5], "33"];
Select[Range[5000], A044095Q] (* Paolo Xausa, Sep 23 2025 *)

Crossrefs

Cf. A007091.

Sequence in context: A023735 A045300 A045189 * A044476 A045264 A297428

Adjacent sequences: A044092 A044093 A044094 * A044096 A044097 A044098

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Sep 23 2025

Status

approved