A044111 - OEIS

A044111

Numbers k such that string 1,3 occurs in the base 6 representation of k but not of k-1.

9, 45, 54, 81, 117, 153, 189, 225, 261, 270, 297, 324, 369, 405, 441, 477, 486, 513, 549, 585, 621, 657, 693, 702, 729, 765, 801, 837, 873, 909, 918, 945, 981, 1017, 1053, 1089, 1125, 1134, 1161, 1197, 1233, 1269, 1305, 1341, 1350, 1377, 1413, 1449, 1485, 1521, 1557

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

MATHEMATICA

A044111Q[k_] := StringContainsQ[IntegerString[k, 6], "13"] && StringFreeQ[IntegerString[k - 1, 6], "13"];

Select[Range[5000], A044111Q] (* Paolo Xausa, Sep 22 2025 *)

CROSSREFS

Cf. A007092.

Sequence in context: A366420 A124983 A087969 * A006886 A053816 A290449

Adjacent sequences: A044108 A044109 A044110 * A044112 A044113 A044114