n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 48 |
5 | 168 |
6 | 608 |
7 | 2268 |
8 | 8662 |
9 | 33778 |
10 | 134184 |
11 | 539871 |
12 | 2197090 |
13 | 9030000 |
14 | 37459341 |
15 | 156606474 |
16 | 659061461 |
17 | 2790192515 |
18 | 11877890745 |
19 | 50819264437 |
20 | 218390536236 |
21 | 942266919891 |
22 | 4080623902277 |
23 | 17732994440363 |
24 | 77305062398569 |
25 | 337974770301276 |
26 | 1481583893527512 |
27 | 6511260259152370 |
[1,2,5,15,48,168,608,2268,8662,33778,134184, 539871,2197090,9030000,37459341,156606474, 659061461,2790192515,11877890745,50819264437, 218390536236,942266919891,4080623902277, 17732994440363,77305062398569,337974770301276, 1481583893527512,6511260259152370] |