n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 20 |
3 | 104 |
4 | 336 |
5 | 1696 |
6 | 5440 |
7 | 27264 |
8 | 87296 |
9 | 436736 |
10 | 1397760 |
11 | 6989824 |
12 | 22368256 |
13 | 111845376 |
14 | 357908480 |
15 | 1789558784 |
16 | 5726601216 |
17 | 28633071616 |
18 | 91625881600 |
19 | 458129670144 |
20 | 1466015154176 |
21 | 7330076819456 |
22 | 23456246661120 |
23 | 117281237499904 |
24 | 375299963355136 |
[1,6,20,104,336,1696,5440,27264,87296,436736, 1397760,6989824,22368256,111845376,357908480, 1789558784,5726601216,28633071616,91625881600, 458129670144,1466015154176,7330076819456, 23456246661120,117281237499904,375299963355136] |