A044162 Numbers n such that string 3,3 occurs in the base 7 representation of n but not of n-1.

24, 73, 122, 168, 220, 269, 318, 367, 416, 465, 511, 563, 612, 661, 710, 759, 808, 854, 906, 955, 1004, 1053, 1102, 1151, 1176, 1249, 1298, 1347, 1396, 1445, 1494, 1540, 1592, 1641, 1690, 1739, 1788, 1837, 1883, 1935, 1984

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {3, 3}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jan 06 2019 *)

Crossrefs

Sequence in context: A339883 A042128 A043406 * A044543 A161587 A042130

Adjacent sequences: A044159 A044160 A044161 * A044163 A044164 A044165

Keyword

nonn,base

Author

Clark Kimberling

Status

approved