138461441domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form (k^4 + 1)/2.at n=22A096170Square array read by descending antidiagonals: T(n,k) = ((2^(n+1) + 1)^(k-1) + 1)/2.at n=50A266577Prime numbersat n=7830084