1 |
anan+1 |
1 |
4 |
|
n(a1+an) |
2 |
n(1+4n-3) |
2 |
1 |
anan+1 |
1 |
(4n-3)(4n-1) |
1 |
4 |
1 |
4n-3 |
1 |
4n+1 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
9 |
1 |
4n-3 |
1 |
4n+1 |
1 |
4 |
1 |
4n+1 |
n |
4n+1 |
n |
4n |
1 |
4 |
n |
k=1 |
1 |
3 |
Sn |
Sn-1 |
Sn |
1 |
bnbn+1 |
1000 |
2009 |
2bn |
an |
1 |
6 |
A.328350 | B.338350 | C.348551 | D.318549 |
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