212981domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form p^2 + p - 1 when p is prime.at n=33A053185Primes of the form (p*(q-1) + (p-1)*q)/2, where p and q are consecutive odd primes.at n=16A099911Primes of the form n^2-n-1 (for some n) such that p^2-p-1 is also prime.at n=34A237642Prime numbersat n=19044