5163068911domain: NAppears in sequencesLowest base with simple divisibility test for n primes; smallest B such that omega(B) + omega(B-1) = n.at n=14A069354a(n) is the smallest number m >= 2 for which the set of prime factors of m, m-1 and m+1 contains at least the first n primes.at n=14A080611