OFFSET
1,1
EXAMPLE
If n=4=even composite and 7=prime(4), then 4<7 and 4=a(1). If n=6=even composite and 13=prime(6), then 6>1. If n=8=even composite and 19=prime(8), then 8>1. If n=10=even composite and 29=prime(10), then 0<2 and 10=a(2). If n=12=even composite and 37=prime(12), then 1<3 and 12=a(3), etc.
MATHEMATICA
Select[2*Range[2, 160], Min[IntegerDigits[#]] < Min[IntegerDigits[Prime[ #]]]&] (* Harvey P. Dale, Aug 18 2011 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Juri-Stepan Gerasimov, Jan 23 2009
EXTENSIONS
Corrected (150 inserted, 160 inserted, other 160 replaced by 260) by R. J. Mathar, May 10 2010
STATUS
approved