n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 15 |
4 | 45 |
5 | 495 |
6 | 16830 |
7 | 4358970 |
8 | 1159486020 |
9 | 196818113950920 |
10 | 3151092455396895169036800 |
11 | 136084696980410308844836382925537725529600 |
12 | 9996588705394796239042140065772174939073840705818917941136700639014745600 |
[1,5,15,45,495,16830,4358970,1159486020, 196818113950920,3151092455396895169036800, 136084696980410308844836382925537725529600, 99965887053947962390421400657721749390738407058189\ 17941136700639014745600] |