1,1
Similar to Fermat primes, A019434, a(n) is of the form (2^2)^k + 1.
Table of n, a(n) for n=1..5.
Select[4^Range[0, 100] + 1, PrimeQ]
Cf. A019434, A092506.
Sequence in context: A096848 A283107 A269834 * A132198 A269835 A111635
Adjacent sequences: A290197 A290198 A290199 * A290201 A290202 A290203
nonn,more
Robert Price, Jul 23 2017
approved
