n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 48 |
4 | 488 |
5 | 6130 |
6 | 92592 |
7 | 1642046 |
8 | 33514112 |
9 | 774478098 |
10 | 19996371200 |
11 | 570583424422 |
12 | 17831721894912 |
13 | 605743986163706 |
14 | 22223926472824832 |
15 | 875786473087350750 |
16 | 36893467224629215232 |
17 | 1654480168085245432354 |
18 | 78692809748219369422848 |
19 | 3956839189675526769415958 |
[1,1,6,48,488,6130,92592,1642046,33514112, 774478098,19996371200,570583424422,17831721894912, 605743986163706,22223926472824832, 875786473087350750,36893467224629215232, 1654480168085245432354,78692809748219369422848, 3956839189675526769415958] |