n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 20 |
4 | 192 |
5 | 1568 |
6 | 12636 |
7 | 114216 |
8 | 1022604 |
9 | 8640980 |
10 | 72406668 |
11 | 605996308 |
12 | 5065065936 |
13 | 42045917448 |
14 | 346705312932 |
15 | 2848191025876 |
16 | 23325323646860 |
17 | 190440300054560 |
18 | 1550193295412264 |
19 | 12585187313440032 |
20 | 101937894879304356 |
21 | 823951520087842720 |
22 | 6646993031822674592 |
[0,0,0,20,192,1568,12636,114216,1022604,8640980, 72406668,605996308,5065065936,42045917448, 346705312932,2848191025876,23325323646860, 190440300054560,1550193295412264, 12585187313440032,101937894879304356, 823951520087842720,6646993031822674592] |