OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..16
MATHEMATICA
Select[FromDigits/@Flatten[Table[PadRight[{11}, i, #]&/@{1, 2, 3, 4, 5, 6, 7, 8, 9}, {i, 2, 1200}], 1], PrimeQ[#]&]
CROSSREFS
KEYWORD
nonn,base,less
AUTHOR
Vincenzo Librandi, Dec 10 2011
STATUS
approved