79549domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 2*n^2 + 22*n + 9.at n=21A154601Primes of the form n^3 + n - 1.at n=13A182332Primes p of the form x^2 + y^2 such that q = (x^2 + 1)/y^2 is a prime less than p.at n=5A282341a(n) = Sum_{k=1..n} gcd(k, n)^3.at n=42A343497Prime numbersat n=7792