229769domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = n*2^n + 2*n^2 + 1.at n=14A046916Primes of the form x^3 + y^3 + 1, where x and y are primes.at n=27A214175Primes p with p-1, p+1, prime(p)-1 and prime(p)+1 all practical.at n=28A257924Prime numbersat n=20418