n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 6 |
4 | 24 |
5 | 14 |
6 | 240 |
7 | 878 |
8 | 1872 |
9 | 34560 |
10 | 143840 |
11 | 542880 |
12 | 4421376 |
13 | 27644438 |
14 | 97250652 |
15 | 1666163520 |
16 | 10523628456 |
17 | 30946448412 |
18 | 779556556800 |
19 | 5873176163328 |
20 | 15288823623792 |
21 | 633207380826720 |
22 | 6399554302310400 |
23 | 22325251164046200 |
24 | 594616643557427040 |
25 | 5146116019164933120 |
[1,1,1,6,24,14,240,878,1872,34560,143840,542880, 4421376,27644438,97250652,1666163520,10523628456, 30946448412,779556556800,5873176163328, 15288823623792,633207380826720,6399554302310400, 22325251164046200,594616643557427040, 5146116019164933120] |