n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 48 |
8 | 115 |
9 | 286 |
10 | 718 |
11 | 1839 |
12 | 4757 |
13 | 12460 |
14 | 32897 |
15 | 87592 |
16 | 234746 |
17 | 633013 |
18 | 1715851 |
19 | 4673320 |
20 | 12781759 |
21 | 35093010 |
22 | 96681705 |
23 | 267199518 |
24 | 740580555 |
25 | 2058042803 |
26 | 5733101603 |
27 | 16006590851 |
28 | 44782679547 |
29 | 125533577578 |
30 | 352525803976 |
31 | 991634575368 |
[1,1,1,2,4,9,20,48,115,286,718,1839,4757,12460, 32897,87592,234746,633013,1715851,4673320, 12781759,35093010,96681705,267199518,740580555, 2058042803,5733101603,16006590851,44782679547, 125533577578,352525803976,991634575368] |