A044355 Numbers n such that string 2,3 occurs in the base 10 representation of n but not of n-1.

23, 123, 223, 230, 323, 423, 523, 623, 723, 823, 923, 1023, 1123, 1223, 1230, 1323, 1423, 1523, 1623, 1723, 1823, 1923, 2023, 2123, 2223, 2230, 2300, 2423, 2523, 2623, 2723, 2823, 2923, 3023, 3123, 3223, 3230, 3323, 3423

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {2, 3}]>0, 1, 0], {n, 3500}], {0, 1}][[All, 2]] (* Harvey P. Dale, Aug 23 2021 *)

Crossrefs

Sequence in context: A362569 A099068 A220408 * A044736 A033211 A142518

Adjacent sequences: A044352 A044353 A044354 * A044356 A044357 A044358

Keyword

nonn,base

Author

Clark Kimberling

Status

approved