n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 20 |
3 | 374 |
4 | 8124 |
5 | 190893 |
6 | 4727788 |
7 | 121543500 |
8 | 3212914524 |
9 | 86782926068 |
10 | 2384725558736 |
11 | 66456350375566 |
12 | 1873703883228900 |
13 | 53351152389518550 |
14 | 1531960347453263112 |
15 | 44311785923563130392 |
16 | 1289909841595078198172 |
17 | 37760636720455988917420 |
18 | 1110927659386926734186992 |
[1,1,20,374,8124,190893,4727788,121543500, 3212914524,86782926068,2384725558736, 66456350375566,1873703883228900,53351152389518550, 1531960347453263112,44311785923563130392, 1289909841595078198172,37760636720455988917420, 1110927659386926734186992] |