A160030 Primes of the form 2^(2^n)+385.

389, 401, 641, 65921, 4294967681, 340282366920938463463374607431768211841

Offset

1,1

Comments

Terms given correspond to n= 1, 2, 3, 4, 5 and 7.

Next term >= 2^2^20 + 385. - Vincenzo Librandi, Jun 07 2016

Next term >= 2^2^33 + 385. - Charles R Greathouse IV, Jun 07 2016

Links

Table of n, a(n) for n=1..6.

Mathematica

Select[Table[2^(2^n) + 385, {n, 0, 20}], PrimeQ] (* Vincenzo Librandi, Jun 07 2016 *)

Prog

(PARI) g(n, m) = for(x=0, n, y=2^(2^x)+m; if(ispseudoprime(y), print1(y", ")))
(Magma) [a: n in [0..15] | IsPrime(a) where a is 2^(2^n)+385]; // Vincenzo Librandi, Jun 07 2016

Crossrefs

Cf. A019434, A160027, A160028, A160029, A160032, A160033, A160034.

Cf. similar sequences listed in A273547.

Sequence in context: A104999 A139660 A098078 * A006476 A282381 A089450

Adjacent sequences: A160027 A160028 A160029 * A160031 A160032 A160033

Keyword

nonn

Author

Cino Hilliard, Apr 30 2009

Status

approved