n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 7 |
5 | 39 |
6 | 409 |
7 | 4687 |
8 | 62822 |
9 | 945250 |
10 | 15999616 |
11 | 300150210 |
12 | 6198330586 |
13 | 139779046596 |
14 | 3420083177362 |
15 | 90241503643208 |
16 | 2554721759776914 |
17 | 77240614583288344 |
18 | 2484170781778551036 |
[1,1,1,7,39,409,4687,62822,945250,15999616, 300150210,6198330586,139779046596,3420083177362, 90241503643208,2554721759776914,77240614583288344, 2484170781778551036] |