n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 30 |
3 | 230 |
4 | 2280 |
5 | 28280 |
6 | 421680 |
7 | 7336880 |
8 | 145879680 |
9 | 3263031680 |
10 | 81097294080 |
11 | 2217097729280 |
12 | 66122900014080 |
13 | 2136392343342080 |
14 | 74335250629908480 |
15 | 2771225281718343680 |
16 | 110198981079416340480 |
17 | 4655992415884353044480 |
18 | 208291013498682750074880 |
19 | 9835804726301090178990080 |
[1,5,30,230,2280,28280,421680,7336880,145879680, 3263031680,81097294080,2217097729280, 66122900014080,2136392343342080,74335250629908480, 2771225281718343680,110198981079416340480, 4655992415884353044480,208291013498682750074880, 9835804726301090178990080] |