$ perl pseudo_acker2.pl 2 4
Iteration 1: i = 2, j = 4
Iteration 2: i = 2, j = 3
Iteration 3: i = 2, j = 2
Iteration 4: i = 2, j = 1
Iteration 5: i = 1, j = 2
Iteration 6: i = 1, j = 4
Iteration 7: i = 1, j = 16
Iteration 8: i = 1, j = 65536
ackermann ( 2, 4) = inf