n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 9 |
4 | 21 |
5 | 45 |
6 | 117 |
7 | 297 |
8 | 585 |
9 | 1521 |
10 | 3105 |
11 | 6993 |
12 | 14553 |
13 | 43653 |
14 | 90885 |
15 | 185925 |
16 | 397125 |
17 | 847125 |
18 | 1813125 |
19 | 3238725 |
20 | 7556829 |
21 | 17253789 |
22 | 36910365 |
23 | 94571997 |
24 | 220301277 |
25 | 475043037 |
26 | 47979336637 |
27 | 183450404605 |
28 | 525019294077 |
[1,3,9,21,45,117,297,585,1521,3105,6993,14553, 43653,90885,185925,397125,847125,1813125,3238725, 7556829,17253789,36910365,94571997,220301277, 475043037,47979336637,183450404605,525019294077] |