n | a(n) |
---|---|
1 | 4 |
2 | 16 |
3 | 86 |
4 | 284 |
5 | 1506 |
6 | 4636 |
7 | 24298 |
8 | 73300 |
9 | 381280 |
10 | 1144292 |
11 | 5923512 |
12 | 17767180 |
13 | 91688754 |
14 | 275195668 |
15 | 1417323260 |
16 | 4257556764 |
17 | 21898760846 |
18 | 65830136636 |
19 | 338306366754 |
20 | 1017543445164 |
21 | 5226264297018 |
22 | 15725498143268 |
23 | 80738182410936 |
[4,16,86,284,1506,4636,24298,73300,381280,1144292, 5923512,17767180,91688754,275195668,1417323260, 4257556764,21898760846,65830136636,338306366754, 1017543445164,5226264297018,15725498143268, 80738182410936] |