n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 30 |
4 | 664 |
5 | 13632 |
6 | 274432 |
7 | 5497344 |
8 | 109987840 |
9 | 2199945216 |
10 | 43999756288 |
11 | 879998926848 |
12 | 17599995314176 |
13 | 351999979683840 |
14 | 7039999912443904 |
15 | 140799999624609792 |
16 | 2815999998397775872 |
17 | 56319999993188450304 |
18 | 1126399999971143188480 |
19 | 22527999999878130302976 |
[0,1,30,664,13632,274432,5497344,109987840, 2199945216,43999756288,879998926848, 17599995314176,351999979683840,7039999912443904, 140799999624609792,2815999998397775872, 56319999993188450304,1126399999971143188480, 22527999999878130302976] |