n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 15 |
4 | 104 |
5 | 1445 |
6 | 18144 |
7 | 364651 |
8 | 6761600 |
9 | 176898249 |
10 | 4376614400 |
11 | 140703601511 |
12 | 4370369292288 |
13 | 166520945009965 |
14 | 6235421191430144 |
15 | 274675339364551875 |
16 | 12046634866183798784 |
17 | 602474837696641959569 |
18 | 30289753591657339944960 |
19 | 1696072847731424941183039 |
[1,1,2,15,104,1445,18144,364651,6761600,176898249, 4376614400,140703601511,4370369292288, 166520945009965,6235421191430144, 274675339364551875,12046634866183798784, 602474837696641959569,30289753591657339944960, 1696072847731424941183039] |