A044214 Numbers k such that string 3,3 occurs in the base 8 representation of k but not of k-1.

27, 91, 155, 216, 283, 347, 411, 475, 539, 603, 667, 728, 795, 859, 923, 987, 1051, 1115, 1179, 1240, 1307, 1371, 1435, 1499, 1563, 1627, 1691, 1728, 1819, 1883, 1947, 2011, 2075, 2139, 2203, 2264, 2331, 2395, 2459, 2523, 2587, 2651, 2715, 2776, 2843, 2907, 2971, 3035, 3099

Offset

1,1

Links

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

Mathematica

A044214Q[k_] := StringContainsQ[IntegerString[k, 8], "33"] && StringFreeQ[IntegerString[k - 1, 8], "33"];
Select[Range[5000], A044214Q] (* Paolo Xausa, Sep 04 2025 *)

Crossrefs

Cf. A007094.

Sequence in context: A034990 A090949 A043434 * A044595 A228600 A286192

Adjacent sequences: A044211 A044212 A044213 * A044215 A044216 A044217

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Sep 04 2025

Status

approved