n | a(n) |
---|---|
0 | 1 |
1 | 10 |
2 | 80 |
3 | 560 |
4 | 3640 |
5 | 22512 |
6 | 134400 |
7 | 781440 |
8 | 4451040 |
9 | 24939200 |
10 | 137865728 |
11 | 753625600 |
12 | 4080643840 |
13 | 21916106240 |
14 | 116877312000 |
15 | 619457482752 |
16 | 3265293719040 |
17 | 17128725519360 |
18 | 89462514606080 |
19 | 465434423336960 |
20 | 2412895587536896 |
21 | 12468681310412800 |
22 | 64242981906022400 |
[1,10,80,560,3640,22512,134400,781440,4451040, 24939200,137865728,753625600,4080643840, 21916106240,116877312000,619457482752, 3265293719040,17128725519360,89462514606080, 465434423336960,2412895587536896, 12468681310412800,64242981906022400] |