Sn-an |
n |
2 |
23 |
n(n-1) |
2 |
2 |
23 |
1 |
23 |
24 |
23 |
1 |
23 |
144 |
23 |
2 |
23 |
n(n-1) |
2 |
Sn-an |
n |
2n2-52n+50 |
n |
50 |
n |
2n×
|
50 |
n |
S2007 |
2007 |
S2005 |
2005 |
A.-2007 | B.-2008 | C.2007 | D.2008 |
S2010 |
2010 |
S2008 |
2008 |
A.31 | B.52 | C.69 | D.92 |
A.2010 | B.2011 | C.2012 | D.2013 |
A.23 | B.24 | C.25 | D.26 |
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