A044272 Numbers k such that string 2,3 occurs in the base 9 representation of k but not of k-1.

21, 102, 183, 189, 264, 345, 426, 507, 588, 669, 750, 831, 912, 918, 993, 1074, 1155, 1236, 1317, 1398, 1479, 1560, 1641, 1647, 1701, 1803, 1884, 1965, 2046, 2127, 2208, 2289, 2370, 2376, 2451, 2532, 2613, 2694, 2775, 2856

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {2, 3}]>0, 1, 0], {n, 3000}], {0, 1}][[;; , 2]] (* Harvey P. Dale, Jul 12 2025 *)

Crossrefs

Sequence in context: A126408 A157329 A356738 * A044653 A076454 A208538

Adjacent sequences: A044269 A044270 A044271 * A044273 A044274 A044275

Keyword

nonn,base

Author

Clark Kimberling

Status

approved