A044221 Numbers n such that string 4,2 occurs in the base 8 representation of n but not of n-1.

34, 98, 162, 226, 272, 290, 354, 418, 482, 546, 610, 674, 738, 784, 802, 866, 930, 994, 1058, 1122, 1186, 1250, 1296, 1314, 1378, 1442, 1506, 1570, 1634, 1698, 1762, 1808, 1826, 1890, 1954, 2018, 2082, 2146, 2176, 2274, 2320

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 8], {4, 2}]>0, 1, 0], {n, 2500}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 26 2019 *)

Crossrefs

Sequence in context: A247218 A233031 A233028 * A044602 A159904 A282854

Adjacent sequences: A044218 A044219 A044220 * A044222 A044223 A044224

Keyword

nonn,base

Author

Clark Kimberling

Status

approved