2 2 2 2 2
-- + --- + --- + --- + ----
3 15 35 63 99
4 2 2 2
=-----+ --- + --- + ----
5 35 63 99
6 2 2
=---- + --- + ----
7 63 99
8 2
=---- + ----
9 99
10
=----
11
2 2 2 2 2
-- + --- + --- + --- + ----
3 15 35 63 99
4 2 2 2
=-----+ --- + --- + ----
5 35 63 99
6 2 2
=---- + --- + ----
7 63 99
8 2
=---- + ----
9 99
10
=----
11