786922domain: NAppears in sequencesIncreasing peaks in the prime gap sequence A038664.at n=17A086979First occurrence of just n semiprimes occurs between the a(n)-th prime and the next prime.at n=40A103669a(n) is the least k such that the number of integers between (1/4)*prime(k) and (1/4)*prime(k+1) is n.at n=35A390785