A044425 Numbers n such that string 9,3 occurs in the base 10 representation of n but not of n-1.

93, 193, 293, 393, 493, 593, 693, 793, 893, 930, 993, 1093, 1193, 1293, 1393, 1493, 1593, 1693, 1793, 1893, 1930, 1993, 2093, 2193, 2293, 2393, 2493, 2593, 2693, 2793, 2893, 2930, 2993, 3093, 3193, 3293, 3393, 3493, 3593

Offset

1,1

Links

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

Mathematica

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {9, 3}]>0, 1, 0], {n, 4000}], {0, 1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, May 25 2016 *)

Crossrefs

Sequence in context: A213114 A250366 A306540 * A044806 A043363 A023736

Adjacent sequences: A044422 A044423 A044424 * A044426 A044427 A044428

Keyword

nonn,base

Author

Clark Kimberling

Status

approved