n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 4 |
4 | 16 |
5 | 48 |
6 | 128 |
7 | 512 |
8 | 2304 |
9 | 6912 |
10 | 22528 |
11 | 273408 |
12 | 2097152 |
13 | 14929920 |
14 | 50331648 |
15 | 390905856 |
16 | 1644167168 |
17 | 12279939072 |
18 | 69660573696 |
19 | 865782202368 |
20 | 5566277615616 |
21 | 41248865910784 |
22 | 215055782117376 |
23 | 2385859554836480 |
24 | 25783171861708800 |
25 | 146322302697472000 |
26 | 1107244165160239104 |
27 | 11063259546716733440 |
28 | 76787161889935196160 |
[1,0,4,16,48,128,512,2304,6912,22528,273408, 2097152,14929920,50331648,390905856,1644167168, 12279939072,69660573696,865782202368, 5566277615616,41248865910784,215055782117376, 2385859554836480,25783171861708800, 146322302697472000,1107244165160239104, 11063259546716733440,76787161889935196160] |