n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 24 |
5 | 240 |
6 | 1440 |
7 | 6720 |
8 | 26880 |
9 | 96768 |
10 | 322560 |
11 | 1013760 |
12 | 3041280 |
13 | 8785920 |
14 | 24600576 |
15 | 67092480 |
16 | 178913280 |
17 | 467927040 |
18 | 1203240960 |
19 | 3048210432 |
20 | 7620526080 |
21 | 18827182080 |
22 | 46022000640 |
23 | 111421685760 |
24 | 267412045824 |
25 | 636695347200 |
26 | 1504916275200 |
[0,0,0,0,24,240,1440,6720,26880,96768,322560, 1013760,3041280,8785920,24600576,67092480, 178913280,467927040,1203240960,3048210432, 7620526080,18827182080,46022000640,111421685760, 267412045824,636695347200,1504916275200] |