A044426 Numbers n such that string 9,4 occurs in the base 10 representation of n but not of n-1.

94, 194, 294, 394, 494, 594, 694, 794, 894, 940, 994, 1094, 1194, 1294, 1394, 1494, 1594, 1694, 1794, 1894, 1940, 1994, 2094, 2194, 2294, 2394, 2494, 2594, 2694, 2794, 2894, 2940, 2994, 3094, 3194, 3294, 3394, 3494, 3594

Offset

1,1

Links

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

Mathematica

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {9, 4}]>0, 1, 0], {n, 4000}], {0, 1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, Mar 13 2016 *)

Crossrefs

Sequence in context: A035117 A096755 A050965 * A044807 A304609 A116109

Adjacent sequences: A044423 A044424 A044425 * A044427 A044428 A044429

Keyword

nonn,base

Author

Clark Kimberling

Status

approved