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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 18 |
| 4 | 30 |
| 5 | 270 |
| 6 | 450 |
| 7 | 630 |
| 8 | 6750 |
| 9 | 9450 |
| 10 | 22050 |
| 11 | 2310 |
| 12 | 3543750 |
| 13 | 4961250 |
| 14 | 53156250 |
| 15 | 727650 |
| 16 | 173643750 |
| 17 | 25467750 |
| 18 | 2668050 |
| 19 | 40020750 |
| 20 | 891371250 |
| 21 | 9550406250 |
| 22 | 1400726250 |
| 23 | 3190703906250 |
| 24 | 467969906250 |
| 25 | 173423250 |
| 26 | 16378946718750 |
| 27 | 1715889656250 |
| 28 | 245684200781250 |
| 29 | 25738344843750 |
| 30 | 8497739250 |
| 31 | 510510 |
| 32 | 6763506750 |
| 33 | 66919696593750 |
[3,6,18,30,270,450,630,6750,9450,22050,2310, 3543750,4961250,53156250,727650,173643750, 25467750,2668050,40020750,891371250,9550406250, 1400726250,3190703906250,467969906250,173423250, 16378946718750,1715889656250,245684200781250, 25738344843750,8497739250,510510,6763506750, 66919696593750] |