n | a(n) |
---|---|
2 | 1 |
3 | 2 |
4 | 5 |
5 | 13 |
6 | 27 |
7 | 76 |
8 | 150 |
9 | 434 |
10 | 845 |
11 | 2470 |
12 | 4797 |
13 | 14085 |
14 | 27377 |
15 | 80584 |
16 | 156900 |
17 | 462620 |
18 | 902394 |
19 | 2664276 |
20 | 5205950 |
21 | 15387670 |
22 | 30114073 |
23 | 89097932 |
24 | 174609162 |
25 | 517058502 |
26 | 1014555607 |
27 | 3006637946 |
28 | 5906040623 |
29 | 17514547015 |
30 | 34438443075 |
[1,2,5,13,27,76,150,434,845,2470,4797,14085,27377, 80584,156900,462620,902394,2664276,5205950, 15387670,30114073,89097932,174609162,517058502, 1014555607,3006637946,5906040623,17514547015, 34438443075] |