n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 158 |
6 | 1282 |
7 | 13158 |
8 | 163354 |
9 | 2374078 |
10 | 39456386 |
11 | 737125446 |
12 | 15279024026 |
13 | 347786765150 |
14 | 8621313613954 |
15 | 231139787526822 |
16 | 6663177374810266 |
17 | 205503866668090750 |
18 | 6751565903597571842 |
[1,1,2,6,26,158,1282,13158,163354,2374078, 39456386,737125446,15279024026,347786765150, 8621313613954,231139787526822,6663177374810266, 205503866668090750,6751565903597571842] |