n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 20 |
3 | 440 |
4 | 17488 |
5 | 1122208 |
6 | 108352576 |
7 | 14910020736 |
8 | 2796629584128 |
9 | 688871838614016 |
10 | 216055818814010368 |
11 | 84109725396766971904 |
12 | 39796388326939272466432 |
13 | 22489039556700087459291136 |
14 | 14957634359368597313889648640 |
15 | 11564305283318420635370333569024 |
[1,2,20,440,17488,1122208,108352576,14910020736, 2796629584128,688871838614016,216055818814010368, 84109725396766971904,39796388326939272466432, 22489039556700087459291136, 14957634359368597313889648640, 11564305283318420635370333569024] |