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

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..22.

Example

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

Prog

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

Crossrefs

Cf. A110299.

Sequence in context: A306006 A364641 A047011 * A259393 A018163 A339293

Adjacent sequences: A359515 A359516 A359517 * A359519 A359520 A359521

Keyword

nonn,more

Author

Michel Marcus, Jan 04 2023

Extensions

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

Status

approved