n | a(n) |
---|---|
5 | 1 |
6 | 15 |
7 | 140 |
8 | 1050 |
9 | 6951 |
10 | 42525 |
11 | 246730 |
12 | 1379400 |
13 | 7508501 |
14 | 40075035 |
15 | 210766920 |
16 | 1096190550 |
17 | 5652751651 |
18 | 28958095545 |
19 | 147589284710 |
20 | 749206090500 |
21 | 3791262568401 |
22 | 19137821912055 |
23 | 96416888184100 |
24 | 485000783495250 |
25 | 2436684974110751 |
26 | 12230196160292565 |
27 | 61338207158409090 |
[1,15,140,1050,6951,42525,246730,1379400,7508501, 40075035,210766920,1096190550,5652751651, 28958095545,147589284710,749206090500, 3791262568401,19137821912055,96416888184100, 485000783495250,2436684974110751, 12230196160292565,61338207158409090] |