OFFSET
1,1
COMMENTS
Nonprime digits are 0, 1, 4, 6, 8 or 9 and even digits are 2, 4, 6 or 8.
EXAMPLE
2(2=2), 11(1+1=2), 23(2=2), 29(9+2=11), 61(1+6=7), 101(1+0+1=2), 113(1+1=2), 127(1+2=3), 131(1+1=2), 151(1+1=2), 163(1+6=7).
CROSSREFS
KEYWORD
nonn,base,less
AUTHOR
Juri-Stepan Gerasimov, Mar 13 2009
EXTENSIONS
Removed 211, added 281 - R. J. Mathar, Oct 22 2009
Typo in data corrected by D. S. McNeil, Aug 17 2010
STATUS
approved