n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 11 |
5 | 41 |
6 | 121 |
7 | 316 |
8 | 757 |
9 | 1961 |
10 | 6281 |
11 | 22166 |
12 | 74031 |
13 | 221937 |
14 | 596961 |
15 | 1460096 |
16 | 3294761 |
17 | 6945521 |
18 | 13818417 |
19 | 26161386 |
20 | 47446611 |
[1,1,2,11,41,121,316,757,1961,6281,22166,74031, 221937,596961,1460096,3294761,6945521,13818417, 26161386,47446611] |