OFFSET

1,1

COMMENTS

Terms given correspond to n = 0, 1, 2, and 4.

Next term >= 2^2^28 + 3. - Charles R Greathouse IV, Jun 08 2016

MATHEMATICA

Select[Table[2^(2^n) + 3, {n, 0, 15}], PrimeQ]

PROG

(Magma) [a: n in [0..10] | IsPrime(a) where a is 2^(2^n)+3];

(PARI) for(n=0, 4, if(ispseudoprime(t=2^2^n+3), print1(t", "))) \\ Charles R Greathouse IV, Jun 08 2016

CROSSREFS

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Jun 07 2016

STATUS

approved