n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 8 |
3 | 84 |
4 | 992 |
5 | 12514 |
6 | 164688 |
7 | 2232200 |
8 | 30920128 |
9 | 435506703 |
10 | 6215660600 |
11 | 89668182220 |
12 | 1305109502496 |
13 | 19138260194422 |
14 | 282441672732656 |
15 | 4191287776164504 |
16 | 62496081197436736 |
17 | 935823746406530603 |
18 | 14065763582458332888 |
19 | 212122153814497767004 |
20 | 3208590886304243284640 |
[0,1,8,84,992,12514,164688,2232200,30920128, 435506703,6215660600,89668182220,1305109502496, 19138260194422,282441672732656,4191287776164504, 62496081197436736,935823746406530603, 14065763582458332888,212122153814497767004, 3208590886304243284640] |