n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 5 |
5 | 15 |
6 | 27 |
7 | 89 |
8 | 165 |
9 | 585 |
10 | 1113 |
11 | 4097 |
12 | 7917 |
13 | 29927 |
14 | 58499 |
15 | 225585 |
16 | 444793 |
17 | 1741521 |
18 | 3457027 |
19 | 13699699 |
20 | 27342421 |
21 | 109420549 |
22 | 219358315 |
23 | 884987529 |
24 | 1780751883 |
25 | 7233519619 |
26 | 14600965705 |
27 | 59656252987 |
28 | 120742510607 |
29 | 495811828759 |
30 | 1005862035461 |
[1,1,1,3,5,15,27,89,165,585,1113,4097,7917,29927, 58499,225585,444793,1741521,3457027,13699699, 27342421,109420549,219358315,884987529,1780751883, 7233519619,14600965705,59656252987,120742510607, 495811828759,1005862035461] |