n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 13 |
7 | 30 |
8 | 72 |
9 | 180 |
10 | 458 |
11 | 1194 |
12 | 3160 |
13 | 8459 |
14 | 22881 |
15 | 62417 |
16 | 171526 |
17 | 474405 |
18 | 1319395 |
19 | 3687711 |
20 | 10352696 |
21 | 29178988 |
[1,1,2,3,6,13,30,72,180,458,1194,3160,8459,22881, 62417,171526,474405,1319395,3687711,10352696, 29178988] |