1 | ||
|
1 | ||
|
1 | ||
|
|
n |
n-1 |
an |
a1 |
an |
an-1 |
an-1 |
an-2 |
a2 |
a1 |
n |
n-1 |
n-1 |
n-2 |
2 |
1 |
1 | ||
|
1 |
(n+1)2-1 |
1 |
n(n+2) |
1 |
2 |
1 |
n |
1 |
n+2 |
1 |
1•3 |
1 |
2•4 |
1 |
3•5 |
1 |
n(n+2) |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
4 |
1 |
3 |
1 |
5 |
1 |
n-1 |
1 |
n+1 |
1 |
n |
1 |
n+2 |
1 |
2 |
1 |
2 |
1 |
n+1 |
1 |
n+2 |
3 |
4 |
2n+3 |
2n(n+1) |
1 |
n(12-an) |
1 |
2 |
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