n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 40 |
6 | 240 |
7 | 560 |
8 | 13440 |
9 | 120960 |
10 | 241920 |
11 | 887040 |
12 | 394240 |
13 | 138378240 |
14 | 276756480 |
15 | 593049600 |
16 | 66421555200 |
17 | 4136140800 |
18 | 173717913600 |
19 | 14302774886400 |
20 | 171633298636800 |
21 | 144171970854912 |
22 | 7208598542745600 |
23 | 283414985441280 |
[1,1,2,6,24,40,240,560,13440,120960,241920,887040, 394240,138378240,276756480,593049600,66421555200, 4136140800,173717913600,14302774886400, 171633298636800,144171970854912,7208598542745600, 283414985441280] |