OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..80
MATHEMATICA
Select[ FromDigits /@ Flatten[ Table[ PadLeft[{1}, i, # ] & /@ {1, 2, 3, 4, 5, 6, 7, 8, 9}, {i, 2, 18}], 1], PrimeQ[ # ] &] (* Robert G. Wilson v, Nov 15 2003 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 05 2003
EXTENSIONS
More terms from Ray Chandler and Robert G. Wilson v, Nov 07 2003
STATUS
approved