n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 22 |
6 | 76 |
7 | 290 |
8 | 1018 |
9 | 3715 |
10 | 11068 |
11 | 24289 |
12 | 102642 |
13 | 163176 |
14 | 527675 |
15 | 1569567 |
16 | 2929322 |
17 | 4752512 |
18 | 21006062 |
19 | 24293375 |
20 | 95578494 |
21 | 205091895 |
[1,1,3,7,22,76,290,1018,3715,11068,24289,102642, 163176,527675,1569567,2929322,4752512,21006062, 24293375,95578494,205091895] |