n | a(n) |
---|---|
1 | 2 |
2 | 8 |
3 | 28 |
4 | 224 |
5 | 1232 |
6 | 4004 |
7 | 56056 |
8 | 896896 |
9 | 8520512 |
10 | 14910896 |
11 | 328039712 |
12 | 41004964 |
13 | 1066129064 |
14 | 29851613792 |
15 | 462700013776 |
16 | 1346036403712 |
17 | 4711127412992 |
18 | 43577928570176 |
19 | 127381637358976 |
20 | 652830891464752 |
21 | 9139632480506528 |
22 | 402143829142287232 |
23 | 9450379984843749952 |
[2,8,28,224,1232,4004,56056,896896,8520512, 14910896,328039712,41004964,1066129064, 29851613792,462700013776,1346036403712, 4711127412992,43577928570176,127381637358976, 652830891464752,9139632480506528, 402143829142287232,9450379984843749952] |