n | a(n) |
---|---|
0 | 2 |
1 | 0 |
2 | 0 |
3 | 128 |
4 | 0 |
5 | 384 |
6 | 3648 |
7 | 1920 |
8 | 20448 |
9 | 71680 |
10 | 125952 |
11 | 537600 |
12 | 1445440 |
13 | 3756288 |
14 | 11173440 |
15 | 29955072 |
16 | 79741908 |
17 | 214759680 |
18 | 564284736 |
19 | 1466972160 |
20 | 3794966880 |
21 | 9719376896 |
22 | 24675685440 |
23 | 62292331392 |
24 | 156254486400 |
25 | 389861188608 |
[2,0,0,128,0,384,3648,1920,20448,71680,125952, 537600,1445440,3756288,11173440,29955072,79741908, 214759680,564284736,1466972160,3794966880, 9719376896,24675685440,62292331392,156254486400, 389861188608] |