Least prime pn such that there is a set p1 < p2 < ... < pn of primes such that, for any distinct p and q in the set, (p + q)/2 is prime.
A381322
Least prime pn such that there is a set p1 < p2 < ... < pn of primes such that, for any distinct p and q in the set, (p + q)/2 is prime.
Terms
- a(0) =2a(1) =7a(2) =19a(3) =71a(4) =113a(5) =383a(6) =509a(7) =881a(8) =2963a(9) =6991a(10) =18521a(11) =27611
External references
- oeis: A381322