208457domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the smallest prime such that it and the previous four primes are all of the form x^2 + n * y^2.at n=7A212605a(n) is the smallest prime such that it and the previous four primes are all of the form x^2 + n * y^2.at n=15A212605Prime numbersat n=18674