112603domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(0) = a(1) = a(2) = 1, a(n) = largest prime <= a(n-1) + a(n-2) + a(n-3).at n=21A126273a(1) = 1; for n > 1, a(n) = 4*a(A252463(n)) + (n mod 4).at n=50A292384Prime numbersat n=10673