1 |
anan+1 |
100 |
209 |
1 |
a1a2 |
1 |
a2a3 |
1 |
an-1an |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
(2n-1)(2n+1) |
1 |
2 |
1 |
1 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
5 |
1 |
7 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2 |
1 |
2n+1 |
n |
2n+1 |
n |
2n+1 |
100 |
209 |
100 |
9 |
100 |
209 |
1 |
4 |
1 |
2 |
1 |
4 |
3 |
4 |
3 |
8 |
3 |
16 |
S2 |
b2 |
1 |
n(an+3) |
1 |
36 |
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