n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 6 |
4 | 57 |
5 | 680 |
6 | 9945 |
7 | 172032 |
8 | 3438673 |
9 | 78003648 |
10 | 1980083025 |
11 | 55616359040 |
12 | 1712630427849 |
13 | 57375166877184 |
14 | 2077563829893097 |
15 | 80859304977696000 |
16 | 3366275257190794785 |
17 | 149270897223530835968 |
18 | 7024011523121427204897 |
19 | 349574012216588890718208 |
[1,0,1,6,57,680,9945,172032,3438673,78003648, 1980083025,55616359040,1712630427849, 57375166877184,2077563829893097,80859304977696000, 3366275257190794785,149270897223530835968, 7024011523121427204897,349574012216588890718208] |