A078744 Numbers k such that A049614(k) + A000040(k) is prime.

1, 4, 6, 7, 8, 13, 17, 18, 21, 41, 86, 101, 144, 368, 1232, 1713, 2431, 2897, 6122, 6240, 6876

Offset: 1

Author

Jason Earls, Dec 21 2002

Keywords

• nonn
• more

Crossrefs

Cf. A000040, A034386, A049614, A078745.

Programs

PARI

is(k) = ispseudoprime(prod(i=1, k, i^!isprime(i)) + prime(k)); \\ Jinyuan Wang, Jan 08 2021

Extensions

a(17)-a(18) from Jinyuan Wang, Jan 08 2021

a(19)-a(21) from Michael S. Branicky, Aug 10 2024