n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 60 |
6 | 180 |
7 | 630 |
8 | 2520 |
9 | 7560 |
10 | 25200 |
11 | 92400 |
12 | 369600 |
13 | 1201200 |
14 | 4204200 |
15 | 15765750 |
16 | 63063000 |
17 | 214414200 |
18 | 771891120 |
19 | 2933186256 |
20 | 11732745024 |
21 | 41064607584 |
22 | 150570227808 |
23 | 577185873264 |
24 | 2308743493056 |
25 | 8245512475200 |
[1,1,2,6,24,60,180,630,2520,7560,25200,92400, 369600,1201200,4204200,15765750,63063000, 214414200,771891120,2933186256,11732745024, 41064607584,150570227808,577185873264, 2308743493056,8245512475200] |