n | a(n) |
---|---|
2 | 0 |
3 | 0 |
4 | 1 |
5 | 7 |
6 | 45 |
7 | 323 |
8 | 2621 |
9 | 23811 |
10 | 239653 |
11 | 2648395 |
12 | 31889517 |
13 | 415641779 |
14 | 5830753109 |
15 | 87601592187 |
16 | 1403439027805 |
17 | 23883728565283 |
18 | 430284458893701 |
19 | 8181419271349931 |
20 | 163730286973255373 |
21 | 3440164703027845395 |
22 | 75718273707281368117 |
23 | 1742211593431076483419 |
[0,0,1,7,45,323,2621,23811,239653,2648395, 31889517,415641779,5830753109,87601592187, 1403439027805,23883728565283,430284458893701, 8181419271349931,163730286973255373, 3440164703027845395,75718273707281368117, 1742211593431076483419] |