OFFSET
1,1
COMMENTS
The next term (a(5)) has 133 digits. - Harvey P. Dale, Jan 18 2024
MATHEMATICA
Select[Table[11^n+3^n-1, {n, 40}], PrimeQ] (* Harvey P. Dale, Jan 18 2024 *)
PROG
(Magma) [ a: n in [0..350] | IsPrime(a) where a is 11^n+3^n-1^n]
CROSSREFS
KEYWORD
nonn,less
AUTHOR
Vincenzo Librandi, Dec 09 2010
STATUS
approved