A(2,1) = A(1,A(2,0))
= A(1,A(1,1))
= A(1,A(0,A(1,0)))
= A(1,A(0,A(0,1)))
= A(1,A(0,2))
= A(1,3)
= A(0,A(1,2))
= A(0,A(0,A(1,1)))
= A(0,A(0,A(0,A(1,0))))
= A(0,A(0,A(0,A(0,1))))
= A(0,A(0,A(0,2)))
= A(0,A(0,3))
= A(0,4)
= 5
Repetition: 14