Least prime p such that the sum of 2i - 1 consecutive primes starting with p is prime for each i <= n and not prime for i = n+1, and -1 if no such prime exists.

A370111

Least prime p such that the sum of 2i - 1 consecutive primes starting with p is prime for each i <= n and not prime for i = n+1, and -1 if no such prime exists.