129313domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers z such that x^2 + y^6 = z^2 (with positive integers x and y) and gcd(x, y, z) = 1.at n=19A293691a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 2, a(1) = 1, a(2) = 1, a(3) = 1.at n=26A295685Prime numbersat n=12104