n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 120 |
4 | 1680 |
5 | 30240 |
6 | 665280 |
7 | 17297280 |
8 | 518918400 |
9 | 17643225600 |
10 | 670442572800 |
11 | 28158588057600 |
12 | 1295295050649600 |
13 | 64764752532480000 |
14 | 3497296636753920000 |
15 | 202843204931727360000 |
16 | 12576278705767096320000 |
17 | 830034394580628357120000 |
18 | 58102407620643984998400000 |
[1,2,12,120,1680,30240,665280,17297280,518918400, 17643225600,670442572800,28158588057600, 1295295050649600,64764752532480000, 3497296636753920000,202843204931727360000, 12576278705767096320000,830034394580628357120000, 58102407620643984998400000] |