n | a(n) |
---|---|
1 | 2 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 8 |
6 | 20 |
7 | 48 |
8 | 112 |
9 | 264 |
10 | 688 |
11 | 1760 |
12 | 4432 |
13 | 11136 |
14 | 30208 |
15 | 80160 |
16 | 209344 |
17 | 547584 |
18 | 1498752 |
19 | 4052224 |
20 | 10840064 |
21 | 28972416 |
22 | 80315136 |
23 | 220124160 |
24 | 597656576 |
25 | 1623036928 |
26 | 4522262528 |
27 | 12503194624 |
28 | 34330329088 |
29 | 94172397568 |
30 | 264205592576 |
31 | 735690285056 |
[2,1,2,4,8,20,48,112,264,688,1760,4432,11136, 30208,80160,209344,547584,1498752,4052224, 10840064,28972416,80315136,220124160,597656576, 1623036928,4522262528,12503194624,34330329088, 94172397568,264205592576,735690285056] |