n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 1 |
4 | 4 |
5 | 9 |
6 | 6 |
7 | 1 |
8 | 21 |
9 | 267 |
10 | 1718 |
11 | 5250 |
12 | 7980 |
13 | 5880 |
14 | 1680 |
15 | 1 |
16 | 494 |
17 | 228591 |
18 | 21539424 |
19 | 685479375 |
20 | 10257064650 |
21 | 86151316860 |
22 | 449772354360 |
23 | 1551283253100 |
24 | 3661969537800 |
25 | 6015983173200 |
26 | 6878457986400 |
27 | 5371454088000 |
28 | 2733402672000 |
29 | 817296480000 |
30 | 108972864000 |
[1,2,1,4,9,6,1,21,267,1718,5250,7980,5880,1680,1, 494,228591,21539424,685479375,10257064650, 86151316860,449772354360,1551283253100, 3661969537800,6015983173200,6878457986400, 5371454088000,2733402672000,817296480000, 108972864000] |