OFFSET
1,1
COMMENTS
The next terms a(9) has 1176 digits. - Vincenzo Librandi, Jul 26 2012
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..8
MATHEMATICA
Select[Table[10^n-2*n+1, {n, 0, 300}], PrimeQ] (* Vincenzo Librandi, Jul 26 2012 *)
PROG
(Magma) [a: n in [0..300] | IsPrime(a) where a is 10^n-2*n+1 ]; // Vincenzo Librandi, Jul 26 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Feb 26 2010
STATUS
approved