n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 6 |
4 | 56 |
5 | 480 |
6 | 5664 |
7 | 75600 |
8 | 1182208 |
9 | 20829312 |
10 | 410768640 |
11 | 8943010560 |
12 | 213187497984 |
13 | 5520777799680 |
14 | 154333888579584 |
15 | 4631752470159360 |
16 | 148523272512307200 |
17 | 5067610703150284800 |
18 | 183308248516478828544 |
19 | 7006773595450681589760 |
20 | 282194468488468121518080 |
[1,0,2,6,56,480,5664,75600,1182208,20829312, 410768640,8943010560,213187497984,5520777799680, 154333888579584,4631752470159360, 148523272512307200,5067610703150284800, 183308248516478828544,7006773595450681589760, 282194468488468121518080] |