n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 31 |
4 | 460 |
5 | 12076 |
6 | 420336 |
7 | 21114864 |
8 | 1325949696 |
9 | 109027627776 |
10 | 10771080883200 |
11 | 1316468976307200 |
12 | 187978181665996800 |
13 | 31997755234356019200 |
14 | 6232784237890147123200 |
15 | 1409976507981835100160000 |
16 | 359243973790625586216960000 |
17 | 104259271562188189469245440000 |
[0,1,3,31,460,12076,420336,21114864,1325949696, 109027627776,10771080883200,1316468976307200, 187978181665996800,31997755234356019200, 6232784237890147123200,1409976507981835100160000, 359243973790625586216960000, 104259271562188189469245440000] |