n | a(n) |
---|---|
2 | 1 |
3 | 9 |
4 | 59 |
5 | 450 |
6 | 3394 |
7 | 30912 |
8 | 293292 |
9 | 3032208 |
10 | 36290736 |
11 | 433762560 |
12 | 5925016800 |
13 | 83648747520 |
14 | 1335385128960 |
15 | 20323375994880 |
16 | 376785057196800 |
17 | 6493118120294400 |
18 | 132672192555571200 |
19 | 2513351450024755200 |
20 | 56577426980420505600 |
21 | 1188283280226545664000 |
22 | 29682641812682686464000 |
23 | 658094690655791972352000 |
[1,9,59,450,3394,30912,293292,3032208,36290736, 433762560,5925016800,83648747520,1335385128960, 20323375994880,376785057196800,6493118120294400, 132672192555571200,2513351450024755200, 56577426980420505600,1188283280226545664000, 29682641812682686464000,658094690655791972352000] |