2n |
bn |
1 |
bn+1 |
1 |
bn |
1 |
bn |
1 |
bn |
1 |
n |
2n |
bn |
2(1-2n) |
1-2 |
1 |
2 |
1 |
3 |
1 |
n |
1 |
2 |
1 |
3 |
1 |
n |
1 |
n+1 |
1 |
2n |
1 |
2 |
1 |
3 |
1 |
n |
1 |
n+1 |
1 |
n+2 |
1 |
2n |
1 |
n+2 |
1 |
n+3 |
1 |
2n+2 |
1 |
n+1 |
1 |
n+2 |
1 |
2n |
1 |
2n+1 |
1 |
2n+2 |
1 |
n+1 |
1 |
2n+1 |
1 |
2n+2 |
1 |
(2n+1)(2n+2) |
1 |
2n+1 |
1 |
2n+2 |
1 |
2n+2 |
1 |
2n+2 |
1 |
n+1 |
A.90 | B.45 | C.30 | D.
|
1 |
n |
A.991 | B.992 | C.993 | D.999 |
c1 |
b1 |
c2 |
b2 |
cn |
bn |
F(n,1) |
F(2,n) |
anan+1 |
A.Sn>l | B.Sn≥l | C.Sn<1 | D.Sn≤l |
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