n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 8 |
5 | 10 |
6 | 24 |
7 | 84 |
8 | 192 |
9 | 432 |
10 | 2880 |
11 | 15840 |
12 | 34560 |
13 | 224640 |
14 | 483840 |
15 | 3628800 |
16 | 116121600 |
17 | 493516800 |
18 | 1045094400 |
19 | 9928396800 |
20 | 20901888000 |
21 | 219469824000 |
22 | 9656672256000 |
23 | 111051730944000 |
24 | 231760134144000 |
25 | 2897001676800000 |
26 | 30128817438720000 |
27 | 406739035422720000 |
[1,1,2,3,8,10,24,84,192,432,2880,15840,34560, 224640,483840,3628800,116121600,493516800, 1045094400,9928396800,20901888000,219469824000, 9656672256000,111051730944000,231760134144000, 2897001676800000,30128817438720000, 406739035422720000] |