A044139 Numbers n such that string 0,1 occurs in the base 7 representation of n but not of n-1.

50, 99, 148, 197, 246, 295, 344, 350, 393, 442, 491, 540, 589, 638, 687, 693, 736, 785, 834, 883, 932, 981, 1030, 1036, 1079, 1128, 1177, 1226, 1275, 1324, 1373, 1379, 1422, 1471, 1520, 1569, 1618, 1667, 1716, 1722, 1765, 1814

Offset

1,1

Links

Table of n, a(n) for n=1..42.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {0, 1}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 25 2017 *)

Crossrefs

Sequence in context: A141757 A248023 A328253 * A044520 A158066 A328305

Adjacent sequences: A044136 A044137 A044138 * A044140 A044141 A044142

Keyword

nonn,base

Author

Clark Kimberling

Status

approved