n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 6 |
4 | 48 |
5 | 300 |
6 | 1800 |
7 | 9072 |
8 | 44928 |
9 | 252720 |
10 | 1555200 |
11 | 9722592 |
12 | 60217344 |
13 | 367960320 |
14 | 2213827200 |
15 | 13180786560 |
16 | 78399995904 |
17 | 468419708160 |
18 | 2810518248960 |
19 | 16894457846784 |
20 | 101554796888064 |
21 | 609923828966400 |
22 | 3659666929459200 |
23 | 21947538146863104 |
24 | 131620960833896448 |
[0,0,6,48,300,1800,9072,44928,252720,1555200, 9722592,60217344,367960320,2213827200,13180786560, 78399995904,468419708160,2810518248960, 16894457846784,101554796888064,609923828966400, 3659666929459200,21947538146863104, 131620960833896448] |