OFFSET
1,1
COMMENTS
EXAMPLE
a(8) = 148th emirp - 147th emirp = 7027 - 3929 = 3098, given that R(7027) = 7207 is prime and R(3929) = 9293 is prime.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Jonathan Vos Post, Feb 03 2011
EXTENSIONS
a(13) - a(17) from Nathaniel Johnston, Apr 26 2011
STATUS
approved