145963domain: NPropertiesPrimalityPrimeyesAppears in sequencesRound(-1/n + 1/log((2n+1)/(2n-1))).at n=22A227513Primes p such that 2*p^2 - 7, 2*p^2 - 1, and 2*p^2 + 3 are prime.at n=21A356510Prime numbersat n=13503