n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 40 |
3 | 180 |
4 | 820 |
5 | 3452 |
6 | 14520 |
7 | 57880 |
8 | 230484 |
9 | 919432 |
10 | 3673908 |
11 | 14687560 |
12 | 58735284 |
13 | 234910792 |
14 | 939583668 |
15 | 3758215240 |
[1,8,40,180,820,3452,14520,57880,230484,919432, 3673908,14687560,58735284,234910792,939583668, 3758215240] |