A033008 Every run of digits of n in base 10 has length 2.

11, 22, 33, 44, 55, 66, 77, 88, 99, 1100, 1122, 1133, 1144, 1155, 1166, 1177, 1188, 1199, 2200, 2211, 2233, 2244, 2255, 2266, 2277, 2288, 2299, 3300, 3311, 3322, 3344, 3355, 3366, 3377, 3388, 3399, 4400, 4411, 4422, 4433

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 02 2014

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..800

Formula

a(n) = 11*A043314(n) (= 11*n for n<10). - M. F. Hasler, Feb 02 2014

Mathematica

Select[Range[10000], Union[Length/@Split[IntegerDigits[#, 10]]]=={2}&] (* Vincenzo Librandi, Feb 05 2014 *)

Crossrefs

Sequence in context: A110732 A044836 A338754 * A082275 A059544 A070022

Adjacent sequences: A033005 A033006 A033007 * A033009 A033010 A033011

Keyword

nonn,base

Author

Clark Kimberling

Status

approved