n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 12 |
6 | 60 |
7 | 360 |
8 | 2520 |
9 | 20160 |
10 | 199584 |
11 | 2147040 |
12 | 25043040 |
13 | 315485280 |
14 | 4274281440 |
15 | 62237343168 |
16 | 968728662720 |
17 | 16046598597120 |
18 | 281802435747840 |
19 | 5229395457937920 |
20 | 102253297006250496 |
21 | 2101387824575550720 |
22 | 45281611027331723520 |
[1,0,0,0,0,12,60,360,2520,20160,199584,2147040, 25043040,315485280,4274281440,62237343168, 968728662720,16046598597120,281802435747840, 5229395457937920,102253297006250496, 2101387824575550720,45281611027331723520] |