n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 60 |
4 | 525 |
5 | 5670 |
6 | 72765 |
7 | 1081080 |
8 | 18243225 |
9 | 344594250 |
10 | 7202019825 |
11 | 164991726900 |
12 | 4111043861925 |
13 | 110681950128750 |
14 | 3201870700153125 |
15 | 99044533658070000 |
16 | 3262279327362680625 |
17 | 113987877673731311250 |
18 | 4211218814057295665625 |
19 | 164015890652757831187500 |
[1,2,9,60,525,5670,72765,1081080,18243225, 344594250,7202019825,164991726900,4111043861925, 110681950128750,3201870700153125, 99044533658070000,3262279327362680625, 113987877673731311250,4211218814057295665625, 164015890652757831187500] |