n | a(n) |
---|---|
1 | 1 |
2 | 8 |
3 | 22 |
4 | 108 |
5 | 684 |
6 | 2736 |
7 | 13556 |
8 | 68972 |
9 | 316068 |
10 | 1534532 |
11 | 7430832 |
12 | 35311040 |
13 | 170094764 |
14 | 817176616 |
15 | 3914397580 |
16 | 18804795120 |
17 | 90252696296 |
18 | 433011737840 |
19 | 2078662232124 |
20 | 9975949817428 |
21 | 47876003240128 |
22 | 229786823307824 |
[1,8,22,108,684,2736,13556,68972,316068,1534532, 7430832,35311040,170094764,817176616,3914397580, 18804795120,90252696296,433011737840, 2078662232124,9975949817428,47876003240128, 229786823307824] |