A033002 Every run of digits of n in base 4 has length 2.

5, 10, 15, 80, 90, 95, 160, 165, 175, 240, 245, 250, 1285, 1290, 1295, 1440, 1445, 1455, 1520, 1525, 1530, 2565, 2570, 2575, 2640, 2650, 2655, 2800, 2805, 2810, 3845, 3850, 3855, 3920, 3930, 3935, 4000, 4005, 4015, 20560

Offset

1,1

Comments

See A043291 and A033001 through A033014 for the analog in other bases, A033015 - A033029 for the variants with run lengths >= 2. - M. F. Hasler, Feb 04 2014

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..600

Formula

a(n) = 5*A043308(n) (= 5*n for n<4). - M. F. Hasler, Feb 04 2014

Mathematica

Select[Range[10000], Union[Length/@Split[IntegerDigits[#, 4]]]=={2}&] (* Vincenzo Librandi, Feb 05 2014 *)

Crossrefs

Sequence in context: A020332 A244025 A044830 * A244021 A351899 A313818

Adjacent sequences: A032999 A033000 A033001 * A033003 A033004 A033005

Keyword

nonn,base

Author

Clark Kimberling

Status

approved