n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 120 |
6 | 6165 |
7 | 258125 |
8 | 10230360 |
9 | 405918324 |
10 | 16530124800 |
11 | 699126562530 |
12 | 30884683104000 |
13 | 1428626760992860 |
14 | 69248819808744576 |
15 | 3516693960681822375 |
16 | 186964957159176734720 |
17 | 10395215954531344335000 |
18 | 603712553730550509035520 |
19 | 36575888366817680447745924 |
[0,0,0,1,120,6165,258125,10230360,405918324, 16530124800,699126562530,30884683104000, 1428626760992860,69248819808744576, 3516693960681822375,186964957159176734720, 10395215954531344335000,603712553730550509035520, 36575888366817680447745924] |