n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 5 |
4 | 32 |
5 | 280 |
6 | 3280 |
7 | 49480 |
8 | 927560 |
9 | 21037640 |
10 | 566134160 |
11 | 17803754560 |
12 | 646052181520 |
13 | 26757321804880 |
14 | 1252934215973600 |
15 | 65791336312915520 |
16 | 3846554938702140320 |
17 | 248841434876849499040 |
18 | 17713758333248102781760 |
19 | 1380631354206969100115200 |
[1,1,5,32,280,3280,49480,927560,21037640, 566134160,17803754560,646052181520,26757321804880, 1252934215973600,65791336312915520, 3846554938702140320,248841434876849499040, 17713758333248102781760,1380631354206969100115200] |