n | a(n) |
---|---|
2 | 2 |
3 | 3 |
4 | 7 |
5 | 23 |
6 | 108 |
7 | 604 |
8 | 3980 |
9 | 30186 |
10 | 258969 |
11 | 2479441 |
12 | 26207604 |
13 | 303119227 |
14 | 3807956707 |
15 | 51633582121 |
16 | 751604592219 |
17 | 11690365070546 |
18 | 193492748067369 |
19 | 3395655743755865 |
20 | 62980031819261211 |
21 | 1230967683216803500 |
[2,3,7,23,108,604,3980,30186,258969,2479441, 26207604,303119227,3807956707,51633582121, 751604592219,11690365070546,193492748067369, 3395655743755865,62980031819261211, 1230967683216803500] |