Starting from two values A and B I have to create a table in order to find a
final value c.
Once I have create that table how can I create another table that returns
the value of c for several As and Bs?

the table should be like this

A\B 0 1 2 3 4
0 C(0,0) C(0,1) C(0,2) C(0,3) C(0,4)....
1 C(1,0) C(1,1) C(1,2) C(1,3) C(1,4)....
2 C(2,0) C(2,1) C(2,2) C(2,3) C(2,4)....
3 C(3,0) C(3,1) C(3,2) C(3,3) C(3,4)....
4 C(4,0) C(4,1) C(4,2) C(4,3) C(4,4)....