n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 28 |
5 | 68 |
6 | 788 |
7 | 2096 |
8 | 74764 |
9 | 297215 |
10 | 56568904 |
11 | 378230514 |
12 | 110049447136 |
13 | 1117730631388 |
14 | 399699792848864 |
15 | 6285859127170900 |
16 | 2788382742936560544 |
[1,2,4,28,68,788,2096,74764,297215,56568904, 378230514,110049447136,1117730631388, 399699792848864,6285859127170900, 2788382742936560544] |