n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 10668 |
3 | 317952 |
4 | 3747430 |
5 | 24569856 |
6 | 117503960 |
7 | 428990464 |
8 | 1355705388 |
9 | 3631734784 |
10 | 9033649880 |
11 | 19996626432 |
12 | 42549627976 |
13 | 82713667584 |
14 | 157758704304 |
15 | 279165280256 |
16 | 490745951846 |
17 | 808950325248 |
18 | 1335670719108 |
19 | 2081937198592 |
20 | 3270650346456 |
21 | 4874720530432 |
[1,0,10668,317952,3747430,24569856,117503960, 428990464,1355705388,3631734784,9033649880, 19996626432,42549627976,82713667584,157758704304, 279165280256,490745951846,808950325248, 1335670719108,2081937198592,3270650346456, 4874720530432] |