n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 2520 |
4 | 45045 |
5 | 102960 |
6 | 232792560 |
7 | 5354228880 |
8 | 1115464350 |
9 | 291136195350 |
10 | 20629078984800 |
11 | 144403552893600 |
12 | 5342931457063200 |
13 | 856326196254765600 |
14 | 9419588158802421600 |
15 | 3099044504245996706400 |
16 | 4106233968125945635980 |
17 | 16424935872503782543920 |
[1,3,15,2520,45045,102960,232792560,5354228880, 1115464350,291136195350,20629078984800, 144403552893600,5342931457063200, 856326196254765600,9419588158802421600, 3099044504245996706400,4106233968125945635980, 16424935872503782543920] |