OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Table[FromDigits[Join[IntegerDigits[n], IntegerDigits[n+3]]], {n, 300}], PrimeQ] (* Harvey P. Dale, Mar 25 2015 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1998
STATUS
approved