OFFSET
1,1
COMMENTS
Odd nonprime digits are 1 or 9 and even prime digit = 2.
The definition presumably implies that the number of odd nonprime digits and the number of even prime digits are both larger than zero. [From R. J. Mathar, Feb 26 2009]
CROSSREFS
KEYWORD
nonn,base,less
AUTHOR
Juri-Stepan Gerasimov, Feb 24 2009
EXTENSIONS
Missing numbers added by R. J. Mathar, Feb 26 2009
STATUS
approved