n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 16 |
4 | 50 |
5 | 171 |
6 | 697 |
7 | 3416 |
8 | 21126 |
9 | 169105 |
10 | 1794683 |
11 | 25891713 |
12 | 507686588 |
13 | 13878639286 |
14 | 518836271475 |
15 | 27356839451662 |
16 | 1968958300103603 |
17 | 200935638262212462 |
18 | 27892630019328034846 |
19 | 5502857784211927305980 |
[1,2,6,16,50,171,697,3416,21126,169105,1794683, 25891713,507686588,13878639286,518836271475, 27356839451662,1968958300103603, 200935638262212462,27892630019328034846, 5502857784211927305980] |