9 |
5 |
(1+2)2 |
1×(1+4) |
16 |
12 |
(2+2)2 |
2×(2+4) |
25 |
21 |
(3+2)2 |
3×(3+4) |
36 |
32 |
(4+2)2 |
4×(4+4) |
∴第n個(gè)數(shù)為:
(n+2)2 |
n(n+4) |
故答案為:
(n+2)2 |
n(n+4) |
9 |
5 |
16 |
12 |
25 |
21 |
36 |
32 |
9 |
5 |
(1+2)2 |
1×(1+4) |
16 |
12 |
(2+2)2 |
2×(2+4) |
25 |
21 |
(3+2)2 |
3×(3+4) |
36 |
32 |
(4+2)2 |
4×(4+4) |
(n+2)2 |
n(n+4) |
(n+2)2 |
n(n+4) |