n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 11 |
5 | 45 |
6 | 197 |
7 | 903 |
8 | 4277 |
9 | 20773 |
10 | 102893 |
11 | 517771 |
12 | 2639571 |
13 | 13603509 |
14 | 70758321 |
15 | 370979823 |
16 | 1958471433 |
17 | 10401832121 |
18 | 55542275273 |
19 | 297991827555 |
20 | 1605599352347 |
21 | 8684388729741 |
22 | 47136082628653 |
23 | 256651601838839 |
[1,1,3,11,45,197,903,4277,20773,102893,517771, 2639571,13603509,70758321,370979823,1958471433, 10401832121,55542275273,297991827555, 1605599352347,8684388729741,47136082628653, 256651601838839] |