n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 12 |
5 | 64 |
6 | 280 |
7 | 1088 |
8 | 3968 |
9 | 13856 |
10 | 46912 |
11 | 155136 |
12 | 503616 |
13 | 1610496 |
14 | 5086336 |
15 | 15895552 |
16 | 49229312 |
17 | 151275008 |
18 | 461662208 |
19 | 1400356864 |
20 | 4224703488 |
21 | 12683452416 |
22 | 37911164928 |
23 | 112865394688 |
24 | 334788444160 |
25 | 989756825600 |
[0,0,0,0,12,64,280,1088,3968,13856,46912,155136, 503616,1610496,5086336,15895552,49229312, 151275008,461662208,1400356864,4224703488, 12683452416,37911164928,112865394688,334788444160, 989756825600] |