n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 92 |
6 | 424 |
7 | 2112 |
8 | 11236 |
9 | 63360 |
10 | 376800 |
11 | 2355016 |
12 | 15430784 |
13 | 105797968 |
14 | 757866592 |
15 | 5664174736 |
16 | 44109816528 |
17 | 357447744576 |
18 | 3010091812000 |
19 | 26304829992224 |
20 | 238217024498432 |
21 | 2232483865359488 |
22 | 21621812897089536 |
23 | 216130222764401024 |
24 | 2226983944005048960 |
[1,1,2,6,22,92,424,2112,11236,63360,376800, 2355016,15430784,105797968,757866592,5664174736, 44109816528,357447744576,3010091812000, 26304829992224,238217024498432,2232483865359488, 21621812897089536,216130222764401024, 2226983944005048960] |