n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 82 |
6 | 343 |
7 | 1509 |
8 | 6893 |
9 | 32419 |
10 | 156058 |
11 | 765578 |
12 | 3815062 |
13 | 19263736 |
14 | 98368919 |
15 | 507197436 |
16 | 2637242188 |
17 | 13814247530 |
18 | 72834238423 |
19 | 386244387688 |
20 | 2058933104170 |
21 | 11026807340592 |
22 | 59304897232442 |
23 | 320181600386661 |
24 | 1734685419170666 |
25 | 9428340999504441 |
[1,1,2,6,21,82,343,1509,6893,32419,156058,765578, 3815062,19263736,98368919,507197436,2637242188, 13814247530,72834238423,386244387688, 2058933104170,11026807340592,59304897232442, 320181600386661,1734685419170666,9428340999504441] |