A044550 Numbers n such that string 4,3 occurs in the base 7 representation of n but not of n+1.

31, 80, 129, 178, 223, 227, 276, 325, 374, 423, 472, 521, 566, 570, 619, 668, 717, 766, 815, 864, 909, 913, 962, 1011, 1060, 1109, 1158, 1207, 1252, 1256, 1305, 1354, 1403, 1452, 1501, 1567, 1595, 1599, 1648, 1697, 1746, 1795

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {4, 3}]>0, 1, 0], {n, 2000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 27 2020 *)

Crossrefs

Sequence in context: A242777 A252231 A044169 * A055810 A142522 A005184

Adjacent sequences: A044547 A044548 A044549 * A044551 A044552 A044553

Keyword

nonn,base

Author

Clark Kimberling

Status

approved