n | a(n) |
---|---|
4 | 1 |
5 | 1 |
6 | 5 |
7 | 17 |
8 | 57 |
9 | 193 |
10 | 650 |
11 | 2173 |
12 | 7199 |
13 | 23619 |
14 | 76746 |
15 | 247103 |
16 | 788934 |
17 | 2499707 |
18 | 7866233 |
19 | 24603551 |
20 | 76538239 |
21 | 236960031 |
22 | 730506849 |
23 | 2243545795 |
24 | 6867375720 |
25 | 20958167581 |
26 | 63791696431 |
27 | 193708118293 |
28 | 586967142587 |
29 | 1775245686845 |
[1,1,5,17,57,193,650,2173,7199,23619,76746,247103, 788934,2499707,7866233,24603551,76538239, 236960031,730506849,2243545795,6867375720, 20958167581,63791696431,193708118293,586967142587, 1775245686845] |