n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 28 |
3 | 144 |
4 | 656 |
5 | 3200 |
6 | 15296 |
7 | 73984 |
8 | 356608 |
9 | 1722368 |
10 | 8313856 |
11 | 40144896 |
12 | 193826816 |
13 | 935886848 |
14 | 4518821888 |
15 | 21818834944 |
16 | 105350496256 |
17 | 508677324800 |
18 | 2456110759936 |
19 | 11859152338944 |
20 | 57261050298368 |
21 | 276480810549248 |
[1,8,28,144,656,3200,15296,73984,356608,1722368, 8313856,40144896,193826816,935886848,4518821888, 21818834944,105350496256,508677324800, 2456110759936,11859152338944,57261050298368, 276480810549248] |