n | a(n) |
---|---|
1 | 1 |
2 | 15 |
3 | 280 |
4 | 5775 |
5 | 126126 |
6 | 2858856 |
7 | 66512160 |
8 | 1577585295 |
9 | 37978905250 |
10 | 925166131890 |
11 | 22754499243840 |
12 | 564121960420200 |
13 | 14079683012144400 |
14 | 353428777651788000 |
15 | 8915829964229105280 |
16 | 225890910734335847055 |
17 | 5744976449471863238250 |
18 | 146603287914300510042750 |
[1,15,280,5775,126126,2858856,66512160,1577585295, 37978905250,925166131890,22754499243840, 564121960420200,14079683012144400, 353428777651788000,8915829964229105280, 225890910734335847055,5744976449471863238250, 146603287914300510042750] |