n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 3 |
4 | 15 |
5 | 45 |
6 | 105 |
7 | 210 |
8 | 378 |
9 | 630 |
10 | 990 |
11 | 1485 |
12 | 2145 |
13 | 3003 |
14 | 4095 |
15 | 5460 |
16 | 7140 |
17 | 9180 |
18 | 11628 |
19 | 14535 |
20 | 17955 |
21 | 21945 |
22 | 26565 |
23 | 31878 |
24 | 37950 |
25 | 44850 |
26 | 52650 |
27 | 61425 |
28 | 71253 |
29 | 82215 |
30 | 94395 |
31 | 107880 |
32 | 122760 |
33 | 139128 |
34 | 157080 |
35 | 176715 |
36 | 198135 |
37 | 221445 |
38 | 246753 |
39 | 274170 |
40 | 303810 |
41 | 335790 |
[0,0,0,3,15,45,105,210,378,630,990,1485,2145,3003, 4095,5460,7140,9180,11628,14535,17955,21945,26565, 31878,37950,44850,52650,61425,71253,82215,94395, 107880,122760,139128,157080,176715,198135,221445, 246753,274170,303810,335790] |