A044268 Numbers n such that string 1,8 occurs in the base 9 representation of n but not of n-1.

17, 98, 153, 179, 260, 341, 422, 503, 584, 665, 746, 827, 882, 908, 989, 1070, 1151, 1232, 1313, 1377, 1475, 1556, 1611, 1637, 1718, 1799, 1880, 1961, 2042, 2123, 2204, 2285, 2340, 2366, 2447, 2528, 2609, 2690, 2771, 2852

Offset

1,1

Links

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

Mathematica

A044268Q[k_] := StringContainsQ[IntegerString[k, 9], "18"] && StringFreeQ[IntegerString[k - 1, 9], "18"];
Select[Range[5000], A044268Q] (* Paolo Xausa, Sep 02 2025 *)

Crossrefs

Sequence in context: A262207 A282997 A231667 * A044649 A253707 A160827

Adjacent sequences: A044265 A044266 A044267 * A044269 A044270 A044271

Keyword

nonn,base

Author

Clark Kimberling

Status

approved