A044204 Numbers n such that string 2,1 occurs in the base 8 representation of n but not of n-1.

17, 81, 136, 145, 209, 273, 337, 401, 465, 529, 593, 648, 657, 721, 785, 849, 913, 977, 1041, 1088, 1160, 1169, 1233, 1297, 1361, 1425, 1489, 1553, 1617, 1672, 1681, 1745, 1809, 1873, 1937, 2001, 2065, 2129, 2184, 2193, 2257

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 8], {2, 1}]>0, 1, 0], {n, 2500}], {0, 1}][[;; , 2]] (* Harvey P. Dale, Jul 30 2023 *)

Crossrefs

Sequence in context: A060934 A228602 A100688 * A044585 A373523 A373518

Adjacent sequences: A044201 A044202 A044203 * A044205 A044206 A044207

Keyword

nonn,base

Author

Clark Kimberling

Status

approved