n | a(n) |
---|---|
0 | 1 |
1 | 1640 |
2 | 673220 |
3 | 123273880 |
4 | 12774087510 |
5 | 854286594072 |
6 | 40098332182820 |
7 | 1400550765961960 |
8 | 38011151426301640 |
9 | 828828255977397080 |
10 | 14911158035799862332 |
11 | 226193352868905599400 |
12 | 2945866488164585776650 |
[1,1640,673220,123273880,12774087510,854286594072, 40098332182820,1400550765961960,38011151426301640, 828828255977397080,14911158035799862332, 226193352868905599400,2945866488164585776650] |