n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 24 |
4 | 172 |
5 | 1360 |
6 | 11444 |
7 | 100520 |
8 | 911068 |
9 | 8457504 |
10 | 80006116 |
11 | 768464312 |
12 | 7474561164 |
13 | 73473471344 |
14 | 728745517972 |
15 | 7284188537672 |
16 | 73301177482172 |
17 | 742009157612608 |
18 | 7550599410874820 |
19 | 77193497566719320 |
20 | 792498588659426924 |
[1,4,24,172,1360,11444,100520,911068,8457504, 80006116,768464312,7474561164,73473471344, 728745517972,7284188537672,73301177482172, 742009157612608,7550599410874820, 77193497566719320,792498588659426924] |