A044331 Numbers k such that the string 8,8 occurs in the base 9 representation of k but not of k-1.

80, 161, 242, 323, 404, 485, 566, 647, 720, 809, 890, 971, 1052, 1133, 1214, 1295, 1376, 1449, 1538, 1619, 1700, 1781, 1862, 1943, 2024, 2105, 2178, 2267, 2348, 2429, 2510, 2591, 2672, 2753, 2834, 2907, 2996, 3077, 3158, 3239, 3320, 3401, 3482, 3563, 3636, 3725, 3806

Offset

1,1

Links

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

Mathematica

A044331Q[k_] := StringContainsQ[IntegerString[k, 9], "88"] && StringFreeQ[IntegerString[k - 1, 9], "88"];
Select[Range[5000], A044331Q] (* Paolo Xausa, Oct 08 2025 *)

Crossrefs

Cf. A007095.

Sequence in context: A044993 A043486 A031496 * A044712 A357080 A044412

Adjacent sequences: A044328 A044329 A044330 * A044332 A044333 A044334

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Oct 08 2025

Status

approved