n | a(n) |
---|---|
2 | 1 |
3 | 4 |
4 | 36 |
5 | 144 |
6 | 1800 |
7 | 43200 |
8 | 705600 |
9 | 705600 |
10 | 2116800 |
11 | 127008000 |
12 | 23051952000 |
13 | 6638962176000 |
14 | 280496151936000 |
15 | 31415569016832000 |
16 | 471233535252480000 |
17 | 471233535252480000 |
18 | 54474596675186688000 |
19 | 3268475800511201280000 |
[1,4,36,144,1800,43200,705600,705600,2116800, 127008000,23051952000,6638962176000, 280496151936000,31415569016832000, 471233535252480000,471233535252480000, 54474596675186688000,3268475800511201280000] |