n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 18 |
4 | 100 |
5 | 794 |
6 | 10414 |
7 | 190428 |
8 | 4659387 |
9 | 143848365 |
10 | 5430367157 |
11 | 242216815664 |
12 | 12631766954130 |
13 | 754181337363809 |
[2,6,18,100,794,10414,190428,4659387,143848365, 5430367157,242216815664,12631766954130, 754181337363809] |