n | a(n) |
---|---|
14 | 1 |
15 | 15 |
16 | 120 |
17 | 680 |
18 | 3060 |
19 | 11628 |
20 | 38760 |
21 | 116280 |
22 | 319770 |
23 | 817190 |
24 | 1961256 |
25 | 4457400 |
26 | 9657700 |
27 | 20058300 |
28 | 40116600 |
29 | 77558760 |
30 | 145422675 |
31 | 265182525 |
32 | 471435600 |
33 | 818809200 |
34 | 1391975640 |
35 | 2319959400 |
36 | 3796297200 |
37 | 6107086800 |
38 | 9669554100 |
39 | 15084504396 |
40 | 23206929840 |
41 | 35240152720 |
[1,15,120,680,3060,11628,38760,116280,319770, 817190,1961256,4457400,9657700,20058300,40116600, 77558760,145422675,265182525,471435600,818809200, 1391975640,2319959400,3796297200,6107086800, 9669554100,15084504396,23206929840,35240152720] |