213467domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes formed by inserting a semiprime between the semiprime's ordered factors.at n=15A229480Primes p such that p^2+q+r, p+q^2+r and p+q+r^2 are all prime, where q and r are the next two primes after p.at n=30A348353Prime numbersat n=19087