OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[10*Range[250], PrimeQ[FromDigits[Join[IntegerDigits[#], {9, 9}]]]&] (* Harvey P. Dale, Jan 06 2013 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Mar 08 2005
STATUS
approved