n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 4 |
6 | 27 |
7 | 120 |
8 | 440 |
9 | 1440 |
10 | 4368 |
11 | 12544 |
12 | 34560 |
13 | 92160 |
14 | 239360 |
15 | 608256 |
16 | 1517568 |
17 | 3727360 |
18 | 9031680 |
19 | 21626880 |
20 | 51249152 |
21 | 120324096 |
22 | 280166400 |
23 | 647495680 |
24 | 1486356480 |
25 | 3391094784 |
26 | 7693402112 |
27 | 17364418560 |
28 | 39007027200 |
29 | 87241523200 |
30 | 194330492928 |
[0,0,0,0,0,4,27,120,440,1440,4368,12544,34560, 92160,239360,608256,1517568,3727360,9031680, 21626880,51249152,120324096,280166400,647495680, 1486356480,3391094784,7693402112,17364418560, 39007027200,87241523200,194330492928] |