n | a(n) |
---|---|
3 | 1 |
4 | 2 |
5 | 4 |
6 | 12 |
7 | 33 |
8 | 102 |
9 | 312 |
10 | 1010 |
11 | 3256 |
12 | 10836 |
13 | 36094 |
14 | 122544 |
15 | 417150 |
16 | 1437712 |
17 | 4970904 |
18 | 17333772 |
19 | 60638124 |
20 | 213435264 |
21 | 753520804 |
22 | 2672606464 |
23 | 9505230397 |
24 | 33928264990 |
25 | 121400935184 |
26 | 435660446342 |
27 | 1566809204928 |
28 | 5648450745204 |
29 | 20402191885146 |
30 | 73842311224632 |
[1,2,4,12,33,102,312,1010,3256,10836,36094,122544, 417150,1437712,4970904,17333772,60638124, 213435264,753520804,2672606464,9505230397, 33928264990,121400935184,435660446342, 1566809204928,5648450745204,20402191885146, 73842311224632] |