n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 98 |
6 | 534 |
7 | 3334 |
8 | 23724 |
9 | 191820 |
10 | 1704532 |
11 | 16689868 |
12 | 179288892 |
13 | 2069311996 |
14 | 25760882744 |
15 | 345073745880 |
16 | 4900331447624 |
[1,2,6,22,98,534,3334,23724,191820,1704532, 16689868,179288892,2069311996,25760882744, 345073745880,4900331447624] |