n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 9 |
3 | 126 |
4 | 2028 |
5 | 35919 |
6 | 674964 |
7 | 13225632 |
8 | 267188229 |
9 | 5525568297 |
10 | 116400215521 |
11 | 2488984609644 |
12 | 53883301460607 |
13 | 1178671076752803 |
14 | 26011822261355487 |
15 | 578441979200964897 |
16 | 12948907700868521142 |
17 | 291569232606979152321 |
18 | 6599274332502483541080 |
[0,1,9,126,2028,35919,674964,13225632,267188229, 5525568297,116400215521,2488984609644, 53883301460607,1178671076752803,26011822261355487, 578441979200964897,12948907700868521142, 291569232606979152321,6599274332502483541080] |