n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 4 |
6 | 17 |
7 | 122 |
8 | 1512 |
9 | 32692 |
10 | 1332942 |
11 | 105327842 |
12 | 15931236010 |
13 | 4514847754466 |
14 | 2400986640234092 |
15 | 2424697785383015323 |
16 | 4646743375611622382082 |
17 | 16785578201380816581985232 |
18 | 114710315501226850209685442155 |
[1,0,0,1,4,17,122,1512,32692,1332942,105327842, 15931236010,4514847754466,2400986640234092, 2424697785383015323,4646743375611622382082, 16785578201380816581985232, 114710315501226850209685442155] |