n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 80 |
4 | 880 |
5 | 12320 |
6 | 209440 |
7 | 4188800 |
8 | 96342400 |
9 | 2504902400 |
10 | 72642169600 |
11 | 2324549427200 |
12 | 81359229952000 |
13 | 3091650738176000 |
14 | 126757680265216000 |
15 | 5577337931669504000 |
16 | 262134882788466688000 |
[1,2,10,80,880,12320,209440,4188800,96342400, 2504902400,72642169600,2324549427200, 81359229952000,3091650738176000, 126757680265216000,5577337931669504000, 262134882788466688000] |