For an=an−1−an−2a_n = a_{n-1} - a_{n-2}an=an−1−an−2 with a0=1,a1=0a_0 = 1, a_1 = 0a0=1,a1=0, find a6a_6a6.
−1-1−1
000
111
−2-2−2