A044186 Numbers n such that string 6,6 occurs in the base 7 representation of n but not of n-1.

48, 97, 146, 195, 244, 293, 336, 391, 440, 489, 538, 587, 636, 679, 734, 783, 832, 881, 930, 979, 1022, 1077, 1126, 1175, 1224, 1273, 1322, 1365, 1420, 1469, 1518, 1567, 1616, 1665, 1708, 1763, 1812, 1861, 1910, 1959, 2008

Offset

1,1

Links

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

Mathematica

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {6, 6}]>0, 1, 0], {n, 2100}], {0, 1}]][[2]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, May 31 2016 *)

Crossrefs

Sequence in context: A218486 A043418 A031486 * A044567 A070258 A260248

Adjacent sequences: A044183 A044184 A044185 * A044187 A044188 A044189

Keyword

nonn,base

Author

Clark Kimberling

Status

approved