n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 70 |
4 | 1 |
5 | 990 |
6 | 34650 |
7 | 1 |
8 | 3640 |
9 | 12870 |
10 | 2702700 |
11 | 63063000 |
12 | 1 |
13 | 9690 |
14 | 251940 |
15 | 26453700 |
16 | 187065450 |
17 | 17459442000 |
18 | 305540235000 |
19 | 1 |
20 | 21252 |
21 | 1470942 |
22 | 2704156 |
23 | 154448910 |
24 | 8031343320 |
25 | 9465511770 |
26 | 374796021600 |
27 | 3975514943400 |
28 | 231905038365000 |
29 | 3246670537110000 |
[1,1,1,70,1,990,34650,1,3640,12870,2702700, 63063000,1,9690,251940,26453700,187065450, 17459442000,305540235000,1,21252,1470942,2704156, 154448910,8031343320,9465511770,374796021600, 3975514943400,231905038365000,3246670537110000] |