n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 12 |
5 | 31 |
6 | 80 |
7 | 210 |
8 | 555 |
9 | 1479 |
10 | 3959 |
11 | 10652 |
12 | 28760 |
13 | 77910 |
14 | 211624 |
15 | 576221 |
16 | 1572210 |
17 | 4297733 |
18 | 11767328 |
19 | 32266801 |
20 | 88594626 |
21 | 243544919 |
22 | 670228623 |
23 | 1846283937 |
24 | 5090605118 |
25 | 14047668068 |
26 | 38794922293 |
27 | 107215238057 |
28 | 296501478704 |
[0,1,2,5,12,31,80,210,555,1479,3959,10652,28760, 77910,211624,576221,1572210,4297733,11767328, 32266801,88594626,243544919,670228623,1846283937, 5090605118,14047668068,38794922293,107215238057, 296501478704] |