n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 12 |
5 | 20 |
6 | 60 |
7 | 84 |
8 | 672 |
9 | 1512 |
10 | 5040 |
11 | 7920 |
12 | 47520 |
13 | 56160 |
14 | 157248 |
15 | 393120 |
16 | 6289920 |
17 | 8225280 |
18 | 37013760 |
19 | 41368320 |
20 | 275788800 |
21 | 579156480 |
22 | 1820206080 |
23 | 2203407360 |
24 | 26440888320 |
25 | 73446912000 |
26 | 173601792000 |
27 | 585906048000 |
28 | 3281073868800 |
29 | 4137006182400 |
30 | 20685030912000 |
[1,1,2,3,12,20,60,84,672,1512,5040,7920,47520, 56160,157248,393120,6289920,8225280,37013760, 41368320,275788800,579156480,1820206080, 2203407360,26440888320,73446912000,173601792000, 585906048000,3281073868800,4137006182400, 20685030912000] |