n | a(n) |
---|---|
1 | 0 |
2 | 20 |
3 | 1376095 |
4 | 1252634243520 |
5 | 8432855707512236000 |
6 | 297155971199028097720850000 |
7 | 42758542523186088601256526892620000 |
8 | 20877662827076969301744211245461828236480000 |
[0,20,1376095,1252634243520,8432855707512236000, 297155971199028097720850000, 42758542523186088601256526892620000, 20877662827076969301744211245461828236480000] |