192900153619domain: NAppears in sequencesa(0) = 4; for n > 0, a(n) = a(n-1)^3 - 3*a(n-1)^2 + 3.at n=3A002813Pierce expansion of (3 - sqrt(5))/2.at n=7A006276a(n) = Lucas(2*n) + 1.at n=27A065034a(n) = L(3*n)/L(n), where L(n) = Lucas number.at n=27A110391Pierce expansion of 1/phi.at n=8A118242