n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 2 |
7 | 3 |
8 | 6 |
9 | 11 |
10 | 18 |
11 | 47 |
12 | 140 |
13 | 456 |
14 | 1541 |
15 | 4859 |
16 | 19189 |
17 | 88716 |
18 | 477610 |
19 | 2733493 |
20 | 16377324 |
21 | 107101430 |
22 | 821473645 |
23 | 7043526337 |
24 | 68487711150 |
25 | 704897480220 |
26 | 8110505465029 |
27 | 102402264000312 |
28 | 1483223734585349 |
29 | 23560655031075409 |
[1,1,1,1,1,2,3,6,11,18,47,140,456,1541,4859,19189, 88716,477610,2733493,16377324,107101430,821473645, 7043526337,68487711150,704897480220,8110505465029, 102402264000312,1483223734585349, 23560655031075409] |