A044281 Numbers n such that string 3,3 occurs in the base 9 representation of n but not of n-1.

30, 111, 192, 270, 354, 435, 516, 597, 678, 759, 840, 921, 999, 1083, 1164, 1245, 1326, 1407, 1488, 1569, 1650, 1728, 1812, 1893, 1974, 2055, 2136, 2217, 2298, 2379, 2430, 2541, 2622, 2703, 2784, 2865, 2946, 3027, 3108

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {3, 3}]>0, 1, 0], {n, 3300}], {0, 1}][[All, 2]] (* Harvey P. Dale, Jun 22 2022 *)

Crossrefs

Sequence in context: A368565 A205836 A043466 * A044662 A205829 A304836

Adjacent sequences: A044278 A044279 A044280 * A044282 A044283 A044284

Keyword

nonn,base

Author

Clark Kimberling

Status

approved