n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 80 |
5 | 690 |
6 | 7092 |
7 | 85162 |
8 | 1168400 |
9 | 18034938 |
10 | 309307340 |
11 | 5835250410 |
12 | 120092842872 |
13 | 2677545756106 |
14 | 64289692962068 |
15 | 1653899162167290 |
16 | 45384277496827424 |
17 | 1323216060906107994 |
18 | 40848835928097158172 |
19 | 1331096992220322502858 |
[0,1,2,12,80,690,7092,85162,1168400,18034938, 309307340,5835250410,120092842872,2677545756106, 64289692962068,1653899162167290,45384277496827424, 1323216060906107994,40848835928097158172, 1331096992220322502858] |