n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 33 |
7 | 90 |
8 | 261 |
9 | 766 |
10 | 2312 |
11 | 7067 |
12 | 21962 |
13 | 68944 |
14 | 218718 |
15 | 699423 |
16 | 2253303 |
17 | 7304522 |
18 | 23812437 |
19 | 78008885 |
20 | 256688310 |
21 | 847979474 |
22 | 2811399583 |
23 | 9351303948 |
24 | 31196953900 |
25 | 104359901859 |
26 | 349979094150 |
27 | 1176395410202 |
28 | 3962715659611 |
29 | 13375015304266 |
[0,1,1,2,5,12,33,90,261,766,2312,7067,21962,68944, 218718,699423,2253303,7304522,23812437,78008885, 256688310,847979474,2811399583,9351303948, 31196953900,104359901859,349979094150, 1176395410202,3962715659611,13375015304266] |