n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 3 |
4 | 24 |
5 | 160 |
6 | 1290 |
7 | 11046 |
8 | 106848 |
9 | 1117152 |
10 | 12849840 |
11 | 159089040 |
12 | 2132602560 |
13 | 30554297280 |
14 | 468754715520 |
15 | 7634862748800 |
16 | 132058767052800 |
17 | 2410986506342400 |
18 | 46443330717235200 |
19 | 939668036761036800 |
20 | 19955747250238464000 |
21 | 443271664862659584000 |
22 | 10290986066890045440000 |
[0,1,3,24,160,1290,11046,106848,1117152,12849840, 159089040,2132602560,30554297280,468754715520, 7634862748800,132058767052800,2410986506342400, 46443330717235200,939668036761036800, 19955747250238464000,443271664862659584000, 10290986066890045440000] |