n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 840 |
4 | 10080 |
5 | 57960 |
6 | 228480 |
7 | 710640 |
8 | 1874880 |
9 | 4379760 |
10 | 9313920 |
11 | 18378360 |
12 | 34114080 |
13 | 60180120 |
14 | 101687040 |
15 | 165590880 |
16 | 261152640 |
17 | 400468320 |
18 | 599074560 |
19 | 876634920 |
20 | 1257711840 |
21 | 1772629320 |
22 | 2458431360 |
23 | 3359941200 |
24 | 4530926400 |
[0,0,840,10080,57960,228480,710640,1874880, 4379760,9313920,18378360,34114080,60180120, 101687040,165590880,261152640,400468320,599074560, 876634920,1257711840,1772629320,2458431360, 3359941200,4530926400] |