n | a(n) |
---|---|
1 | 4 |
2 | 132 |
3 | 264 |
4 | 1872 |
5 | 6820 |
6 | 31420 |
7 | 123826 |
8 | 515268 |
9 | 2058802 |
10 | 8332796 |
11 | 33350162 |
12 | 133891940 |
13 | 535789038 |
14 | 2145632584 |
15 | 8584207782 |
16 | 34349419412 |
17 | 137408677592 |
18 | 549699224224 |
19 | 2198863697876 |
20 | 8795786194236 |
21 | 35183533311476 |
22 | 140735839290104 |
[4,132,264,1872,6820,31420,123826,515268,2058802, 8332796,33350162,133891940,535789038,2145632584, 8584207782,34349419412,137408677592,549699224224, 2198863697876,8795786194236,35183533311476, 140735839290104] |