n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 80 |
3 | 4480 |
4 | 462080 |
5 | 77248000 |
6 | 18902835200 |
7 | 6385348403200 |
8 | 2843287396352000 |
9 | 1614575957622784000 |
10 | 1138477316012441600000 |
11 | 976037590707833405440000 |
12 | 999765439694232249958400000 |
[1,4,80,4480,462080,77248000,18902835200, 6385348403200,2843287396352000, 1614575957622784000,1138477316012441600000, 976037590707833405440000, 999765439694232249958400000] |