n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 20 |
3 | 1680 |
4 | 369600 |
5 | 166923119 |
6 | 134612399509 |
7 | 176468898415460 |
8 | 351456009607660440 |
9 | 1010384984894493146400 |
10 | 4028532188816344883922611 |
11 | 21572165225621811583520157531 |
12 | 151100918612288209338643024889160 |
13 | 1354217120536797195675961944817053840 |
[1,1,20,1680,369600,166923119,134612399509, 176468898415460,351456009607660440, 1010384984894493146400,4028532188816344883922611, 21572165225621811583520157531, 151100918612288209338643024889160, 1354217120536797195675961944817053840] |