A044223 Numbers n such that string 4,4 occurs in the base 8 representation of n but not of n-1.

36, 100, 164, 228, 288, 356, 420, 484, 548, 612, 676, 740, 800, 868, 932, 996, 1060, 1124, 1188, 1252, 1312, 1380, 1444, 1508, 1572, 1636, 1700, 1764, 1824, 1892, 1956, 2020, 2084, 2148, 2212, 2276, 2304, 2404, 2468, 2532

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[3000], MemberQ[Partition[IntegerDigits[#, 8], 2, 1], {4, 4}] && !MemberQ[Partition[IntegerDigits[#-1, 8], 2, 1], {4, 4}]&] (* Harvey P. Dale, Oct 12 2012 *)
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 8], {4, 4}]>0, 1, 0], {n, 2600}], {0, 1}][[All, 2]] (* Harvey P. Dale, May 10 2022 *)

Crossrefs

Sequence in context: A348826 A062703 A043438 * A044604 A375144 A340017

Adjacent sequences: A044220 A044221 A044222 * A044224 A044225 A044226

Keyword

nonn,base

Author

Clark Kimberling

Status

approved