n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 203 |
7 | 877 |
8 | 4140 |
9 | 21147 |
10 | 115975 |
11 | 678570 |
12 | 4213596 |
13 | 27644358 |
14 | 190895863 |
15 | 1382847419 |
16 | 10477213268 |
17 | 82797679445 |
18 | 680685836527 |
19 | 5806124780384 |
20 | 51245294979716 |
21 | 466668627500968 |
22 | 4371727233798927 |
23 | 42000637216351225 |
[1,2,5,15,52,203,877,4140,21147,115975,678570, 4213596,27644358,190895863,1382847419,10477213268, 82797679445,680685836527,5806124780384, 51245294979716,466668627500968,4371727233798927, 42000637216351225] |