A370190 Numbers k such that (6^k + 6*k)/6 is prime.

1, 5, 7, 1003, 40513

Offset

1,2

Comments

If it exists, a(6) > 62000.

Links

Table of n, a(n) for n=1..5.

Prog

(PARI) is(n) = ispseudoprime(6^(n-1)+n)

Crossrefs

Cf. A058828, A221908, A226200.

Sequence in context: A101829 A056252 A274774 * A176599 A309409 A291687

Adjacent sequences: A370187 A370188 A370189 * A370191 A370192 A370193

Keyword

nonn,hard,more

Author

Hugo Pfoertner, Feb 24 2024

Status

approved