n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 11 |
6 | 41 |
7 | 162 |
8 | 715 |
9 | 3425 |
10 | 17722 |
11 | 98253 |
12 | 580317 |
13 | 3633280 |
14 | 24011157 |
15 | 166888165 |
16 | 1216070380 |
17 | 9264071767 |
18 | 73600798037 |
19 | 608476008122 |
20 | 5224266196935 |
21 | 46499892038437 |
22 | 428369924118314 |
23 | 4078345814329009 |
24 | 40073660040755337 |
25 | 405885209254049952 |
26 | 4232705122975949401 |
[1,0,1,1,4,11,41,162,715,3425,17722,98253,580317, 3633280,24011157,166888165,1216070380,9264071767, 73600798037,608476008122,5224266196935, 46499892038437,428369924118314,4078345814329009, 40073660040755337,405885209254049952, 4232705122975949401] |