A359518 Integers k such that A110299(k) is prime.

1, 2, 3, 5, 10, 17, 21, 28, 38, 50, 86, 88, 100, 375, 408, 630, 646, 1241, 1860, 4359, 15444, 17916, 74901, 91968, 101121

Offset: 1

Author

Michel Marcus, Jan 04 2023

Keywords

• nonn
• more

Comments

Integers k such that Sum_{i=0..k-1} 2^i*prime(k-i) is prime.

Examples

			For these k, A110299(k) is 2, 7, 19, 101, 3727, 481577, 7706203, 986404613, ... all prime.
		

Crossrefs

Cf. A110299.

Programs

PARI

isok(k) = isprime(fromdigits(primes(k), 2));

Extensions

a(20)-a(22) from Pontus von Brömssen, Jan 04 2023

a(23)-a(25) from Michael S. Branicky, Oct 02 2024