n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 24 |
4 | 54 |
5 | 492 |
6 | 1944 |
7 | 11976 |
8 | 57024 |
9 | 313440 |
10 | 1587168 |
11 | 8417472 |
12 | 43483392 |
13 | 227995008 |
14 | 1185394176 |
15 | 6192642048 |
16 | 32263570944 |
17 | 168350991360 |
18 | 877689686016 |
19 | 4578049517568 |
20 | 23872537976832 |
21 | 124504626978816 |
22 | 649282059657216 |
23 | 3386128302882816 |
24 | 17658788068196352 |
[1,0,24,54,492,1944,11976,57024,313440,1587168, 8417472,43483392,227995008,1185394176,6192642048, 32263570944,168350991360,877689686016, 4578049517568,23872537976832,124504626978816, 649282059657216,3386128302882816, 17658788068196352] |