n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 3 |
6 | 8 |
7 | 14 |
8 | 39 |
9 | 96 |
10 | 297 |
11 | 915 |
12 | 3308 |
13 | 12417 |
14 | 51347 |
15 | 222595 |
16 | 1016975 |
17 | 4799520 |
18 | 23301779 |
19 | 115405815 |
20 | 581071711 |
21 | 2963793396 |
22 | 15283327150 |
23 | 79544488072 |
24 | 417377448058 |
[0,1,1,2,3,8,14,39,96,297,915,3308,12417,51347, 222595,1016975,4799520,23301779,115405815, 581071711,2963793396,15283327150,79544488072, 417377448058] |