n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 4 |
4 | 4 |
5 | 36 |
6 | 256 |
7 | 400 |
8 | 17424 |
9 | 784 |
10 | 1478656 |
11 | 876096 |
12 | 154753600 |
13 | 560363584 |
14 | 19057250304 |
15 | 220388935936 |
16 | 2564046397696 |
17 | 83038749753600 |
18 | 327933273309184 |
19 | 33173161139160064 |
20 | 26222822450021376 |
21 | 14475245839622726656 |
[1,1,0,4,4,36,256,400,17424,784,1478656,876096, 154753600,560363584,19057250304,220388935936, 2564046397696,83038749753600,327933273309184, 33173161139160064,26222822450021376, 14475245839622726656] |