Tables                        T1

   n =. 5
   i. n
0 1 2 3 4
   a =. i. n 
0 1 2 3 4
   
   a +/ a
0 1 2 3 4
1 2 3 4 5
2 3 4 5 6
3 4 5 6 7
4 5 6 7 8
   
   n | a +/ a
0 1 2 3 4
1 2 3 4 0
2 3 4 0 1
3 4 0 1 2
4 0 1 2 3
   
