n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 40 |
3 | 180 |
4 | 788 |
5 | 3372 |
6 | 14048 |
7 | 57208 |
8 | 231212 |
9 | 929924 |
10 | 3725868 |
11 | 1492500 |
12 | 59718716 |
13 | 238943360 |
14 | 955894516 |
15 | 3823815736 |
[1,8,40,180,788,3372,14048,57208,231212,929924, 3725868,1492500,59718716,238943360,955894516, 3823815736] |