n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 156 |
4 | 4556 |
5 | 417384 |
6 | 128004240 |
7 | 136874853504 |
8 | 523288667468832 |
9 | 7257782720507161152 |
10 | 368292386875012729754240 |
11 | 68761030015590030510485191680 |
12 | 47447175348985315294381264871833600 |
[1,3,15,156,4556,417384,128004240,136874853504, 523288667468832,7257782720507161152, 368292386875012729754240, 68761030015590030510485191680, 47447175348985315294381264871833600] |