A363797 Numbers k such that 3^k + 2*k is prime.

1, 2, 4, 8, 10, 14, 17, 34, 74, 127, 137, 160, 925, 1117, 5767, 11810, 15220, 37015, 46289

Offset

1,2

Comments

Numbers k such that A363796(k) = 3.

Any subsequent terms are > 100000. - Lucas A. Brown, Oct 18 2024

Links

Table of n, a(n) for n=1..19.

Example

a(3) = 4 is a term because 3^4 + 2*4 = 89 is prime.

Maple

select(k -> isprime(3^k + 2*k), [$1..7000]);

Crossrefs

Cf. A363796.

Sequence in context: A290476 A189670 A341822 * A034822 A300781 A050567

Adjacent sequences: A363794 A363795 A363796 * A363798 A363799 A363800

Keyword

nonn,more

Author

Robert Israel, Jun 23 2023

Extensions

a(16)-a(19) from Michael S. Branicky, Jun 23 2023

Status

approved