n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 4 |
4 | 4 |
5 | 36 |
6 | 256 |
7 | 1282 |
8 | 9864 |
9 | 99976 |
10 | 970528 |
11 | 9702848 |
12 | 113092200 |
13 | 1500063930 |
14 | 20985500212 |
15 | 305177475748 |
16 | 4733232671056 |
17 | 79461918315024 |
18 | 1427464201289584 |
19 | 26955955609799728 |
20 | 531536672155429792 |
21 | 10980840178654738496 |
22 | 238597651836121062824 |
23 | 5446220581860028853936 |
[1,0,4,4,36,256,1282,9864,99976,970528,9702848, 113092200,1500063930,20985500212,305177475748, 4733232671056,79461918315024,1427464201289584, 26955955609799728,531536672155429792, 10980840178654738496,238597651836121062824, 5446220581860028853936] |