A044215 - OEIS

A044215

Numbers k such that string 3,4 occurs in the base 8 representation of k but not of k-1.

28, 92, 156, 220, 224, 284, 348, 412, 476, 540, 604, 668, 732, 736, 796, 860, 924, 988, 1052, 1116, 1180, 1244, 1248, 1308, 1372, 1436, 1500, 1564, 1628, 1692, 1756, 1760, 1792, 1884, 1948, 2012, 2076, 2140, 2204, 2268, 2272

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

OFFSET

1,1

LINKS

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

MATHEMATICA

A044215Q[k_] := StringContainsQ[IntegerString[k, 8], "34"] && StringFreeQ[IntegerString[k - 1, 8], "34"];

Select[Range[5000], A044215Q] (* Paolo Xausa, Sep 03 2025 *)

CROSSREFS

Cf. A007094.

Sequence in context: A272399 A113958 A219815 * A044596 A331765 A333280

Adjacent sequences: A044212 A044213 A044214 * A044216 A044217 A044218

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved