n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 48 |
8 | 115 |
9 | 286 |
10 | 719 |
11 | 1842 |
12 | 4765 |
13 | 12483 |
14 | 32964 |
15 | 87785 |
16 | 235305 |
17 | 634628 |
18 | 1720524 |
19 | 4686842 |
20 | 12820920 |
21 | 35206475 |
22 | 97010705 |
23 | 268154003 |
24 | 743351390 |
25 | 2066090876 |
26 | 5756490561 |
27 | 16074597300 |
28 | 44980514021 |
29 | 126109353817 |
30 | 354202275766 |
31 | 996517941454 |
[1,1,1,2,4,9,20,48,115,286,719,1842,4765,12483, 32964,87785,235305,634628,1720524,4686842, 12820920,35206475,97010705,268154003,743351390, 2066090876,5756490561,16074597300,44980514021, 126109353817,354202275766,996517941454] |