n | a(n) |
---|---|
0 | 4 |
1 | 36 |
2 | 252 |
3 | 1197 |
4 | 47880 |
5 | 1388520 |
6 | 23604840 |
7 | 153431460 |
8 | 843873030 |
9 | 2953555605 |
10 | 17721333630 |
11 | 2091117368340 |
12 | 33457877893440 |
13 | 769531191549120 |
14 | 28472654087317440 |
15 | 2249339672898077760 |
16 | 2249339672898077760 |
17 | 200191230887928920640 |
18 | 9408987851732659270080 |
19 | 1881797570346531854016 |
[4,36,252,1197,47880,1388520,23604840,153431460, 843873030,2953555605,17721333630,2091117368340, 33457877893440,769531191549120,28472654087317440, 2249339672898077760,2249339672898077760, 200191230887928920640,9408987851732659270080, 1881797570346531854016] |