A044523 Numbers n such that string 0,4 occurs in the base 7 representation of n but not of n+1.

53, 102, 151, 200, 249, 298, 347, 377, 396, 445, 494, 543, 592, 641, 690, 720, 739, 788, 837, 886, 935, 984, 1033, 1063, 1082, 1131, 1180, 1229, 1278, 1327, 1376, 1406, 1425, 1474, 1523, 1572, 1621, 1670, 1719, 1749, 1768, 1817

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {0, 4}]>0, 1, 0], {n, 2000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 03 2019 *)

Crossrefs

Sequence in context: A180520 A139959 A044142 * A063363 A288619 A039476

Adjacent sequences: A044520 A044521 A044522 * A044524 A044525 A044526

Keyword

nonn,base

Author

Clark Kimberling

Status

approved