n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 105 |
5 | 944 |
6 | 10340 |
7 | 133055 |
8 | 1958060 |
9 | 32279090 |
10 | 586453658 |
11 | 11589971918 |
12 | 246518371679 |
13 | 5594169454700 |
14 | 134456679614850 |
15 | 3402014360391645 |
16 | 90146180439817440 |
17 | 2490533922180210720 |
18 | 71468389947184389600 |
19 | 2123114263550335500000 |
[1,1,3,15,105,944,10340,133055,1958060,32279090, 586453658,11589971918,246518371679,5594169454700, 134456679614850,3402014360391645, 90146180439817440,2490533922180210720, 71468389947184389600,2123114263550335500000] |