n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 6 |
3 | 12 |
4 | 16 |
5 | 120 |
6 | 30 |
7 | 1680 |
8 | 48 |
9 | 30240 |
10 | 70 |
11 | 665280 |
12 | 96 |
13 | 17297280 |
14 | 126 |
15 | 518918400 |
16 | 160 |
17 | 17643225600 |
18 | 198 |
19 | 670442572800 |
20 | 240 |
21 | 28158588057600 |
22 | 286 |
23 | 1295295050649600 |
24 | 336 |
25 | 64764752532480000 |
26 | 390 |
27 | 3497296636753920000 |
28 | 448 |
[0,2,6,12,16,120,30,1680,48,30240,70,665280,96, 17297280,126,518918400,160,17643225600,198, 670442572800,240,28158588057600,286, 1295295050649600,336,64764752532480000,390, 3497296636753920000,448] |