n | a(n) |
---|---|
3 | 1 |
4 | 0 |
5 | 10 |
6 | 40 |
7 | 315 |
8 | 2464 |
9 | 22260 |
10 | 222480 |
11 | 2447445 |
12 | 29369120 |
13 | 381798846 |
14 | 5345183480 |
15 | 80177752655 |
16 | 1282844041920 |
17 | 21808348713320 |
18 | 392550276838944 |
19 | 7458455259940905 |
20 | 149169105198816960 |
21 | 3132551209175157490 |
22 | 68916126601853463240 |
[1,0,10,40,315,2464,22260,222480,2447445,29369120, 381798846,5345183480,80177752655,1282844041920, 21808348713320,392550276838944,7458455259940905, 149169105198816960,3132551209175157490, 68916126601853463240] |