208049domain: NPropertiesPrimalityPrimeyesAppears in sequencesDirichlet convolution of primes (with 1) with Catalan numbers.at n=12A034763Largest of 3 consecutive prime numbers such that p1*p2*p3 + d1 + d2 + 1 = average of twin prime pairs, d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=31A153408Prime numbersat n=18639