n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 72 |
4 | 664 |
5 | 7440 |
6 | 98064 |
7 | 1486464 |
8 | 25476480 |
9 | 487192320 |
10 | 10284768000 |
11 | 237574149120 |
12 | 5960907832320 |
13 | 161440734873600 |
14 | 4694193123379200 |
15 | 145855192928256000 |
16 | 4822943651308339200 |
17 | 169104439543534387200 |
18 | 6266811206473703424000 |
[1,2,10,72,664,7440,98064,1486464,25476480, 487192320,10284768000,237574149120,5960907832320, 161440734873600,4694193123379200, 145855192928256000,4822943651308339200, 169104439543534387200,6266811206473703424000] |