n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 2 |
6 | 4 |
7 | 8 |
8 | 16 |
9 | 48 |
10 | 144 |
11 | 432 |
12 | 1296 |
13 | 5184 |
14 | 20736 |
15 | 82944 |
16 | 331776 |
17 | 1658880 |
18 | 8294400 |
19 | 41472000 |
20 | 207360000 |
21 | 1244160000 |
22 | 7464960000 |
23 | 44789760000 |
24 | 268738560000 |
25 | 1881169920000 |
26 | 13168189440000 |
27 | 92177326080000 |
28 | 645241282560000 |
29 | 5161930260480000 |
[1,1,1,1,2,4,8,16,48,144,432,1296,5184,20736, 82944,331776,1658880,8294400,41472000,207360000, 1244160000,7464960000,44789760000,268738560000, 1881169920000,13168189440000,92177326080000, 645241282560000,5161930260480000] |