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| n | a(n) |
|---|---|
| 8 | 1 |
| 9 | 3138 |
| 10 | 35850 |
| 11 | 110715 |
| 12 | 228294 |
| 13 | 412698 |
| 14 | 705341 |
| 15 | 1162800 |
| 16 | 1860480 |
| 17 | 2899248 |
| 18 | 4412826 |
| 19 | 6575976 |
| 20 | 9614000 |
| 21 | 13813800 |
| 22 | 19536660 |
| 23 | 27232920 |
| 24 | 37458720 |
| 25 | 50895000 |
| 26 | 68368950 |
| 27 | 90878112 |
| 28 | 119617344 |
| 29 | 156008864 |
| 30 | 201735600 |
| 31 | 258778080 |
| 32 | 329455104 |
[1,3138,35850,110715,228294,412698,705341,1162800, 1860480,2899248,4412826,6575976,9614000,13813800, 19536660,27232920,37458720,50895000,68368950, 90878112,119617344,156008864,201735600,258778080, 329455104] |