A033011 Every run of digits of n in base 13 has length 2.

14, 28, 42, 56, 70, 84, 98, 112, 126, 140, 154, 168, 2366, 2394, 2408, 2422, 2436, 2450, 2464, 2478, 2492, 2506, 2520, 2534, 4732, 4746, 4774, 4788, 4802, 4816, 4830, 4844, 4858, 4872, 4886, 4900, 7098, 7112, 7126, 7154

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Comments

See A043291 and A033001 through A033014 for the analog in other bases. See A033015 through A033029 for the variants with run lengths >= 2. - M. F. Hasler, Feb 02 2014

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1800

Programs

Mathematica

Select[Range[8000],Union[Length/@Split[IntegerDigits[#,13]]]=={2}&] (* Harvey P. Dale, Feb 27 2013 *)

Formula

a(n) = 14*A043317(n) (= 14*n for n<13). - M. F. Hasler, Feb 02 2014