n | a(n) |
---|---|
7 | 1 |
8 | 56 |
9 | 1953 |
10 | 54740 |
11 | 1353275 |
12 | 30872016 |
13 | 666563898 |
14 | 13834413152 |
15 | 278818865325 |
16 | 5494563394320 |
17 | 106395830418878 |
18 | 2031659407077300 |
19 | 38359579905883600 |
20 | 717595238609316480 |
21 | 13321581681795883020 |
22 | 245722278467924356560 |
23 | 4507944342815596914910 |
[1,56,1953,54740,1353275,30872016,666563898, 13834413152,278818865325,5494563394320, 106395830418878,2031659407077300, 38359579905883600,717595238609316480, 13321581681795883020,245722278467924356560, 4507944342815596914910] |