Cf. A028491 = numbers n such that (3^n  1)/2 is prime.
Cf. A057468 = numbers n such that 3^n  2^n is prime.
Cf. A059801 = numbers n such that 4^n  3^n is prime.
Cf. A121877 = numbers n such that (5^n  3^n)/2 is a prime.
Cf. A128024, A128025, A128026, A128027, A128028, A128029, A128030, A128032.
Sequence in context: A080306 A036448 A128346 * A194128 A127995 A316839
Adjacent sequences: A128028 A128029 A128030 * A128032 A128033 A128034
