n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 16 |
6 | 60 |
7 | 261 |
8 | 1243 |
9 | 6257 |
10 | 32721 |
11 | 175760 |
12 | 963900 |
13 | 5374400 |
14 | 30385256 |
15 | 173837631 |
16 | 1004867079 |
17 | 5861610475 |
18 | 34469014515 |
19 | 204161960310 |
20 | 1217145238485 |
21 | 7299007647552 |
22 | 44005602441840 |
[1,1,2,5,16,60,261,1243,6257,32721,175760,963900, 5374400,30385256,173837631,1004867079,5861610475, 34469014515,204161960310,1217145238485, 7299007647552,44005602441840] |