n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | 32 |
4 | 432 |
5 | 7424 |
6 | 157120 |
7 | 3949056 |
8 | 114972928 |
9 | 3805503488 |
10 | 141137150976 |
11 | 5797706178560 |
12 | 261309106499584 |
13 | 12821127008550912 |
14 | 680286677982625792 |
15 | 38814037079505895424 |
16 | 2369659425449311272960 |
17 | 154142301601844298776576 |
18 | 10642813349855965483368448 |
[1,0,4,32,432,7424,157120,3949056,114972928, 3805503488,141137150976,5797706178560, 261309106499584,12821127008550912, 680286677982625792,38814037079505895424, 2369659425449311272960,154142301601844298776576, 10642813349855965483368448] |