Solve an=4an−1−4an−2a_n = 4a_{n-1} - 4a_{n-2}an=4an−1−4an−2 with a0=1,a1=4a_0 = 1, a_1 = 4a0=1,a1=4. What is a3a_3a3?
121212
161616
242424
323232