n | a(n) |
---|---|
0 | 120 |
1 | 2640 |
2 | 28512 |
3 | 205920 |
4 | 1132560 |
5 | 5096520 |
6 | 19631040 |
7 | 66745536 |
8 | 204787440 |
9 | 576438720 |
10 | 1507608960 |
11 | 3700494720 |
12 | 8593371072 |
13 | 19004570640 |
14 | 40244973120 |
15 | 81980500800 |
16 | 161264274600 |
17 | 307350735120 |
18 | 569168028000 |
19 | 1026681084000 |
20 | 1807851474000 |
21 | 3113521983000 |
[120,2640,28512,205920,1132560,5096520,19631040, 66745536,204787440,576438720,1507608960, 3700494720,8593371072,19004570640,40244973120, 81980500800,161264274600,307350735120, 569168028000,1026681084000,1807851474000, 3113521983000] |