n | a(n) |
---|---|
0 | -1 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 64 |
5 | 2002 |
6 | 69264 |
7 | 2697354 |
8 | 117899520 |
9 | 5740530914 |
10 | 308814720400 |
11 | 18213955960378 |
12 | 1169672907313728 |
13 | 81286160430474066 |
14 | 6080123714344570128 |
15 | 487166244246501489002 |
16 | 41636260100744439399424 |
17 | 3781449867356996500139458 |
18 | 363724112817207189865471248 |
[-1,0,0,2,64,2002,69264,2697354,117899520, 5740530914,308814720400,18213955960378, 1169672907313728,81286160430474066, 6080123714344570128,487166244246501489002, 41636260100744439399424,3781449867356996500139458, 363724112817207189865471248] |