n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 24 |
5 | 60 |
6 | 120 |
7 | 210 |
8 | 40656 |
9 | 363384 |
10 | 2117520 |
11 | 9980190 |
12 | 520250280 |
13 | 9496208436 |
14 | 109522054824 |
15 | 982593614730 |
16 | 28426015541280 |
17 | 762523155318000 |
18 | 14192088961120416 |
19 | 204618562767970614 |
20 | 4906638448867994040 |
21 | 154037798077765359660 |
22 | 4000484484370905087480 |
[1,0,0,0,24,60,120,210,40656,363384,2117520, 9980190,520250280,9496208436,109522054824, 982593614730,28426015541280,762523155318000, 14192088961120416,204618562767970614, 4906638448867994040,154037798077765359660, 4000484484370905087480] |