A044263 - OEIS

A044263

Numbers k such that string 1,3 occurs in the base 9 representation of k but not of k-1.

12, 93, 108, 174, 255, 336, 417, 498, 579, 660, 741, 822, 837, 903, 972, 1065, 1146, 1227, 1308, 1389, 1470, 1551, 1566, 1632, 1713, 1794, 1875, 1956, 2037, 2118, 2199, 2280, 2295, 2361, 2442, 2523, 2604, 2685, 2766, 2847

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OFFSET

1,1

LINKS

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

MATHEMATICA

A044263Q[k_] := StringContainsQ[IntegerString[k, 9], "13"] && StringFreeQ[IntegerString[k - 1, 9], "13"];

Select[Range[5000], A044263Q] (* Paolo Xausa, Sep 02 2025 *)

CROSSREFS

Sequence in context: A383736 A220937 A221291 * A044644 A173348 A294449

Adjacent sequences: A044260 A044261 A044262 * A044264 A044265 A044266

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved