A044146 Numbers n such that string 1,1 occurs in the base 7 representation of n but not of n-1.

8, 56, 106, 155, 204, 253, 302, 351, 392, 449, 498, 547, 596, 645, 694, 742, 792, 841, 890, 939, 988, 1037, 1085, 1135, 1184, 1233, 1282, 1331, 1380, 1428, 1478, 1527, 1576, 1625, 1674, 1723, 1771, 1821, 1870, 1919, 1968

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {1, 1}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 24 2017 *)

Crossrefs

Sequence in context: A160429 A003722 A364124 * A118772 A212817 A355948

Adjacent sequences: A044143 A044144 A044145 * A044147 A044148 A044149

Keyword

nonn,base

Author

Clark Kimberling

Status

approved