login
A033005
Every run of digits of n in base 7 has length 2.
2
8, 16, 24, 32, 40, 48, 392, 408, 416, 424, 432, 440, 784, 792, 808, 816, 824, 832, 1176, 1184, 1192, 1208, 1216, 1224, 1568, 1576, 1584, 1592, 1608, 1616, 1960, 1968, 1976, 1984, 1992, 2008, 2352, 2360, 2368, 2376, 2384, 2392
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
FORMULA
a(n) = 8*A043311(n) (= 8*n for n<7). - M. F. Hasler, Feb 02 2014
MATHEMATICA
Select[Range[2500], Union[Length/@Split[IntegerDigits[#, 7]]]=={2}&] (* Harvey P. Dale, Oct 24 2011 *)
CROSSREFS
Sequence in context: A031488 A020335 A044833 * A072066 A342018 A369035
KEYWORD
nonn,base
STATUS
approved