A044286 Numbers k such that the string 3,8 occurs in the base 9 representation of k but not of k-1.

35, 116, 197, 278, 315, 359, 440, 521, 602, 683, 764, 845, 926, 1007, 1044, 1088, 1169, 1250, 1331, 1412, 1493, 1574, 1655, 1736, 1773, 1817, 1898, 1979, 2060, 2141, 2222, 2303, 2384, 2465, 2502, 2546, 2627, 2708, 2789, 2835, 2951, 3032, 3113, 3194, 3231, 3275, 3356

Offset

1,1

Links

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

Mathematica

A044286Q[k_] := StringContainsQ[IntegerString[k, 9], "38"] && StringFreeQ[IntegerString[k - 1, 9], "38"];
Select[Range[5000], A044286Q] (* Paolo Xausa, Oct 02 2025 *)

Crossrefs

Cf. A007095.

Sequence in context: A268118 A374809 A212888 * A044667 A262455 A132144

Adjacent sequences: A044283 A044284 A044285 * A044287 A044288 A044289

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Oct 02 2025

Status

approved