A044239 Numbers k such that string 6,4 occurs in the base 8 representation of k but not of k-1.

52, 116, 180, 244, 308, 372, 416, 436, 500, 564, 628, 692, 756, 820, 884, 928, 948, 1012, 1076, 1140, 1204, 1268, 1332, 1396, 1440, 1460, 1524, 1588, 1652, 1716, 1780, 1844, 1908, 1952, 1972, 2036, 2100, 2164, 2228, 2292, 2356

Offset

1,1

Links

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

Mathematica

A044239Q[k_] := StringContainsQ[IntegerString[k, 8], "64"] && StringFreeQ[IntegerString[k - 1, 8], "64"];
Select[Range[5000], A044239Q] (* Paolo Xausa, Sep 03 2025 *)

Crossrefs

Sequence in context: A272140 A252343 A252336 * A044620 A209988 A326912

Adjacent sequences: A044236 A044237 A044238 * A044240 A044241 A044242

Keyword

nonn,base

Author

Clark Kimberling

Status

approved