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| n | a(n) |
|---|---|
| 2 | 3 |
| 3 | 30 |
| 4 | 315 |
| 5 | 11340 |
| 6 | 311850 |
| 7 | 12162150 |
| 8 | 638512875 |
| 9 | 86837751000 |
| 10 | 7424627710500 |
| 11 | 779585909602500 |
| 12 | 98617617564716250 |
| 13 | 14792642634707437500 |
| 14 | 2596108782391155281250 |
| 15 | 527010082825404522093750 |
| 16 | 122529844256906551386796875 |
| 17 | 64695757767646659132228750000 |
[3,30,315,11340,311850,12162150,638512875, 86837751000,7424627710500,779585909602500, 98617617564716250,14792642634707437500, 2596108782391155281250,527010082825404522093750, 122529844256906551386796875, 64695757767646659132228750000] |