OFFSET
1,1
COMMENTS
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1800
FORMULA
a(n) = 14*A043317(n) (= 14*n for n<13). - M. F. Hasler, Feb 02 2014
MATHEMATICA
Select[Range[8000], Union[Length/@Split[IntegerDigits[#, 13]]]=={2}&] (* Harvey P. Dale, Feb 27 2013 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved