n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 96 |
6 | 504 |
7 | 3216 |
8 | 24024 |
9 | 177816 |
10 | 1538424 |
11 | 15108216 |
12 | 165392664 |
13 | 1793999256 |
14 | 21693217464 |
15 | 288019921656 |
16 | 4154515368024 |
17 | 59434596913656 |
18 | 924041894967864 |
19 | 15469081577068056 |
20 | 276917744041735704 |
21 | 4921195271561687256 |
22 | 93549435117715431864 |
[1,1,2,6,24,96,504,3216,24024,177816,1538424, 15108216,165392664,1793999256,21693217464, 288019921656,4154515368024,59434596913656, 924041894967864,15469081577068056, 276917744041735704,4921195271561687256, 93549435117715431864] |