A044310 Numbers k such that the string 6,5 occurs in the base 9 representation of k but not of k-1.

59, 140, 221, 302, 383, 464, 531, 545, 626, 707, 788, 869, 950, 1031, 1112, 1193, 1260, 1274, 1355, 1436, 1517, 1598, 1679, 1760, 1841, 1922, 1989, 2003, 2084, 2165, 2246, 2327, 2408, 2489, 2570, 2651, 2718, 2732, 2813, 2894, 2975, 3056, 3137, 3218, 3299, 3380, 3447

Offset

1,1

Links

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

Mathematica

A044310Q[k_] := StringContainsQ[IntegerString[k, 9], "65"] && StringFreeQ[IntegerString[k - 1, 9], "65"];
Select[Range[5000], A044310Q] (* Paolo Xausa, Oct 06 2025 *)

Crossrefs

Cf. A007095.

Sequence in context: A220463 A142171 A129480 * A044691 A156796 A183348

Adjacent sequences: A044307 A044308 A044309 * A044311 A044312 A044313

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Oct 06 2025

Status

approved