n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 9 |
4 | 32 |
5 | 250 |
6 | 864 |
7 | 12348 |
8 | 67584 |
9 | 804816 |
10 | 5760000 |
11 | 116915040 |
12 | 686776320 |
13 | 19323757440 |
14 | 157991178240 |
15 | 2951575200000 |
16 | 42301705420800 |
17 | 1202482800691200 |
18 | 10048607738265600 |
19 | 425162773111910400 |
20 | 4541227794432000000 |
[1,2,9,32,250,864,12348,67584,804816,5760000, 116915040,686776320,19323757440,157991178240, 2951575200000,42301705420800,1202482800691200, 10048607738265600,425162773111910400, 4541227794432000000] |