208843domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of form p^2-6, p also a prime.at n=23A162905Primes of the form k!4 - 2, where k!4 is the quadruple factorial number (A007662).at n=6A289860Number of connected 2n-regular loopless multigraphs with five nodes.at n=32A324221Prime numbersat n=18707