6044737domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form k^(k+1)+(k-1)^k.at n=2A181681Primes of the form 7^x + y^7 with x, y > 0.at n=3A250844a(n) = n^(n+1) + (n-1)^n.at n=7A258388Prime numbersat n=415721