234863domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = a(n-1) + a(n-3) + a(n-4) with initial values a(0) = 8, a(1)=5, a(2) = 13, a(3) = 30.at n=22A347902Smallest integer m for which A378568(m) = n.at n=28A378570Prime numbersat n=20821