n | a(n) |
---|---|
1 | 4 |
2 | 12 |
3 | 40 |
4 | 144 |
5 | 544 |
6 | 2112 |
7 | 8320 |
8 | 33024 |
9 | 131584 |
10 | 525312 |
11 | 2099200 |
12 | 8392704 |
13 | 33562624 |
14 | 134234112 |
15 | 536903680 |
16 | 2147549184 |
17 | 8590065664 |
18 | 34360000512 |
19 | 137439477760 |
20 | 549756862464 |
21 | 2199025352704 |
22 | 8796097216512 |
23 | 35184380477440 |
24 | 140737505132544 |
25 | 562949986975744 |
[4,12,40,144,544,2112,8320,33024,131584,525312, 2099200,8392704,33562624,134234112,536903680, 2147549184,8590065664,34360000512,137439477760, 549756862464,2199025352704,8796097216512, 35184380477440,140737505132544,562949986975744] |