n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 60 |
6 | 270 |
7 | 1890 |
8 | 14280 |
9 | 128520 |
10 | 1096200 |
11 | 12058200 |
12 | 139043520 |
13 | 1807565760 |
14 | 22642139520 |
15 | 339632092800 |
16 | 5237183952000 |
17 | 89032127184000 |
18 | 1475427973219200 |
19 | 28033131491164800 |
20 | 543494606861606400 |
21 | 11413386744093734400 |
22 | 235075995738558374400 |
23 | 5406747901986842611200 |
24 | 126214560713084056012800 |
[1,1,1,3,12,60,270,1890,14280,128520,1096200, 12058200,139043520,1807565760,22642139520, 339632092800,5237183952000,89032127184000, 1475427973219200,28033131491164800, 543494606861606400,11413386744093734400, 235075995738558374400,5406747901986842611200, 126214560713084056012800] |