将正整数按如下图所示的规律排列,若用有序数对(m , n)表示从上到下第m行,和该行从左到右第n个数,如(4,2)表示整数8,则(8,4)表示的整数是( )
(1,1) | (2,1) | A(3,1) | (4,1) | (5,1) | (6,1) | (7,1) | (8,1) |
(1,2) | (2,2) | (3,2) | (4,2) | (5,2) | (6,2) | (7,2) | (8,2) |
(1,3) | (2,3) | (3,3) | (4,3) | (5,3) | (6,3) | (7,3) | (8,3) |
(1,4) | (2,4) | (3,4) | (4, 4) | (5,4) | (6,4) | B(7,4) | (8,4) |
(1,5) | (2,5) | (3,5) | (4,5) | (5,5) | (6,5) | (7,5) | (8,5) |
(1,6) | (2,6) | (3,6) | (4,6) | (5,6) | (6,6) | (7,6) | (8,6) |