n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 16 |
5 | 88 |
6 | 416 |
7 | 1824 |
8 | 7680 |
9 | 31616 |
10 | 128512 |
11 | 518656 |
12 | 2084864 |
13 | 8361984 |
14 | 33497088 |
15 | 134094848 |
16 | 536608768 |
17 | 2146926592 |
18 | 8588754944 |
19 | 34357248000 |
20 | 137433710592 |
21 | 549744803840 |
22 | 2199000186880 |
23 | 8796044787712 |
24 | 35184271425536 |
25 | 140737278640128 |
26 | 562949517213696 |
[0,0,0,2,16,88,416,1824,7680,31616,128512,518656, 2084864,8361984,33497088,134094848,536608768, 2146926592,8588754944,34357248000,137433710592, 549744803840,2199000186880,8796044787712, 35184271425536,140737278640128,562949517213696] |