n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 31 |
4 | 364 |
5 | 5766 |
6 | 115300 |
7 | 2788724 |
8 | 79197040 |
9 | 2583928360 |
10 | 95256535936 |
11 | 3916137470664 |
12 | 177651980724160 |
13 | 8815348234689920 |
14 | 474993826614917632 |
15 | 27619367979975064576 |
16 | 1723821221240101984000 |
17 | 114948301218300412117632 |
[1,1,4,31,364,5766,115300,2788724,79197040, 2583928360,95256535936,3916137470664, 177651980724160,8815348234689920, 474993826614917632,27619367979975064576, 1723821221240101984000,114948301218300412117632] |