A240589 Primes of the form (k + 2)^k + 2.

3, 5, 127, 4782971, 2357947693

Offset

1,1

Comments

The values of k are 0, 1, 3, 7, 9, 259, ... - Jinyuan Wang, May 15 2020

Links

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

Example

3 is in this sequence because (0+2)^0 + 2 = 1 + 2 = 3 for k = 0,
5 is in this sequence because (1+2)^1 + 2 = 3 + 2 = 5 for k = 1,
127 is in this sequence because (3+2)^3 + 2 = 125 + 2 = 127 for k = 3.

Prog

(Magma) [a: n in [0..9] | IsPrime(a) where a is (n+2)^n+2];

Crossrefs

Sequence in context: A245442 A215239 A161749 * A180541 A103993 A088269

Adjacent sequences: A240586 A240587 A240588 * A240590 A240591 A240592

Keyword

nonn

Author

Ilya Lopatin and Juri-Stepan Gerasimov, Apr 08 2014

Status

approved