1 |
anan+1 |
4 |
25 |
A.13 | B.14 | C.15 | D.16 |
1 |
anan+1 |
1 |
(3n-1)(3n+2) |
1 |
3 |
1 |
3n-1 |
1 |
3n+2 |
1 |
anan+1 |
4 |
25 |
1 |
3 |
1 |
2 |
1 |
5 |
1 |
3 |
1 |
5 |
1 |
8 |
1 |
3 |
1 |
8 |
1 |
11 |
1 |
3 |
1 |
3n-1 |
1 |
3n+2 |
1 |
3 |
1 |
2 |
1 |
3n+2 |
4 |
25 |
1 |
2 |
cn |
n+1 |
an |
n+2 |
sn |
n |
s2 |
2 |
s3 |
3 |
sn |
n |
A.1007 | B.1006 | C.2012 | D.2013 |
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