A044543 Numbers n such that string 3,3 occurs in the base 7 representation of n but not of n+1.

24, 73, 122, 174, 220, 269, 318, 367, 416, 465, 517, 563, 612, 661, 710, 759, 808, 860, 906, 955, 1004, 1053, 1102, 1151, 1224, 1249, 1298, 1347, 1396, 1445, 1494, 1546, 1592, 1641, 1690, 1739, 1788, 1837, 1889, 1935, 1984

Offset

1,1

Links

Table of n, a(n) for n=1..41.

Mathematica

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {3, 3}]>0, 1, 0], {n, 3000}], {1, 0}]][[1]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, May 18 2015 *)

Crossrefs

Sequence in context: A042128 A043406 A044162 * A161587 A042130 A042132

Adjacent sequences: A044540 A044541 A044542 * A044544 A044545 A044546

Keyword

nonn,base

Author

Clark Kimberling

Status

approved