n | a(n) |
---|---|
2 | 1 |
3 | 3 |
4 | 6 |
5 | 30 |
6 | 60 |
7 | 420 |
8 | 840 |
9 | 7560 |
10 | 15120 |
11 | 166320 |
12 | 332640 |
13 | 4324320 |
14 | 8648640 |
15 | 129729600 |
16 | 259459200 |
17 | 4410806400 |
18 | 8821612800 |
19 | 167610643200 |
20 | 335221286400 |
21 | 7039647014400 |
22 | 14079294028800 |
23 | 323823762662400 |
24 | 647647525324800 |
25 | 16191188133120000 |
26 | 32382376266240000 |
[1,3,6,30,60,420,840,7560,15120,166320,332640, 4324320,8648640,129729600,259459200,4410806400, 8821612800,167610643200,335221286400, 7039647014400,14079294028800,323823762662400, 647647525324800,16191188133120000, 32382376266240000] |