n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 16 |
4 | 64 |
5 | 384 |
6 | 2304 |
7 | 18432 |
8 | 147456 |
9 | 1474560 |
10 | 14745600 |
11 | 176947200 |
12 | 2123366400 |
13 | 29727129600 |
14 | 416179814400 |
15 | 6658877030400 |
16 | 106542032486400 |
17 | 1917756584755200 |
18 | 34519618525593600 |
19 | 690392370511872000 |
20 | 13807847410237440000 |
21 | 303772643025223680000 |
[1,2,4,16,64,384,2304,18432,147456,1474560, 14745600,176947200,2123366400,29727129600, 416179814400,6658877030400,106542032486400, 1917756584755200,34519618525593600, 690392370511872000,13807847410237440000, 303772643025223680000] |