n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 15 |
6 | 75 |
7 | 225 |
8 | 525 |
9 | 1050 |
10 | 1890 |
11 | 3150 |
12 | 4950 |
13 | 7425 |
14 | 10725 |
15 | 15015 |
16 | 20475 |
17 | 27300 |
18 | 35700 |
19 | 45900 |
20 | 58140 |
21 | 72675 |
22 | 89775 |
23 | 109725 |
24 | 132825 |
25 | 159390 |
26 | 189750 |
27 | 224250 |
28 | 263250 |
29 | 307125 |
30 | 356265 |
31 | 411075 |
32 | 471975 |
33 | 539400 |
34 | 613800 |
35 | 695640 |
36 | 785400 |
37 | 883575 |
38 | 990675 |
39 | 1107225 |
[0,0,0,0,15,75,225,525,1050,1890,3150,4950,7425, 10725,15015,20475,27300,35700,45900,58140,72675, 89775,109725,132825,159390,189750,224250,263250, 307125,356265,411075,471975,539400,613800,695640, 785400,883575,990675,1107225] |