n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 96 |
6 | 576 |
7 | 3312 |
8 | 21456 |
9 | 152784 |
10 | 1237536 |
11 | 9984096 |
12 | 133494912 |
13 | 1412107776 |
14 | 16369357824 |
15 | 206123325696 |
16 | 2866280276736 |
17 | 36809077162752 |
18 | 592066290710016 |
19 | 8800038127378944 |
20 | 136876273991755776 |
21 | 2197453620220010496 |
22 | 37915306084793106432 |
[1,1,2,6,24,96,576,3312,21456,152784,1237536, 9984096,133494912,1412107776,16369357824, 206123325696,2866280276736,36809077162752, 592066290710016,8800038127378944, 136876273991755776,2197453620220010496, 37915306084793106432] |