476719domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = a(n-2)+a(n-3)+a(n-4)+a(n-5)+2*a(n-6)+a(n-7).at n=31A109541Primes of the form 2x^3 + x + 1.at n=16A114350Prime numbersat n=39761