a(2,1),a(2,2),a(2,3),a(2,4),a(2,5)a(3,1),a(3,2),a(3,3),a(3,4),a(3,5)a(4,1),a(4,2),a(4,3),a(4,4),a(4,5)a(5,1),a(5,2),a(5,3),a(5,4),a(5,5)
