n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 3 |
6 | 9 |
7 | 19 |
8 | 58 |
9 | 160 |
10 | 499 |
11 | 1527 |
12 | 4940 |
13 | 16001 |
14 | 53187 |
15 | 178305 |
16 | 606330 |
17 | 2079863 |
18 | 7203864 |
19 | 25138879 |
20 | 88367780 |
21 | 312577245 |
22 | 1112119079 |
23 | 3977502767 |
24 | 14294207172 |
25 | 51596165898 |
26 | 186998138529 |
27 | 680272336906 |
28 | 2483341820512 |
29 | 9094756956909 |
[1,1,1,2,3,9,19,58,160,499,1527,4940,16001,53187, 178305,606330,2079863,7203864,25138879,88367780, 312577245,1112119079,3977502767,14294207172, 51596165898,186998138529,680272336906, 2483341820512,9094756956909] |