n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 32 |
5 | 240 |
6 | 3114 |
7 | 44065 |
8 | 777720 |
9 | 15582168 |
10 | 357427770 |
11 | 9151281293 |
12 | 259607392164 |
13 | 8070381333872 |
14 | 272960010908662 |
15 | 9976300661919345 |
16 | 391837137436921072 |
17 | 16458193396472517328 |
18 | 736145006794621566642 |
19 | 34932117830021859779517 |
20 | 1752782822664497750549660 |
[0,0,2,3,32,240,3114,44065,777720,15582168, 357427770,9151281293,259607392164,8070381333872, 272960010908662,9976300661919345, 391837137436921072,16458193396472517328, 736145006794621566642,34932117830021859779517, 1752782822664497750549660] |