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| n | a(n) |
|---|---|
| 0 | 75 |
| 1 | 21875 |
| 2 | 5512500 |
| 3 | 1512630000 |
| 4 | 484041600000 |
| 5 | 184834742400000 |
| 6 | 84715923600000000 |
| 7 | 46534591303200000000 |
| 8 | 30489464221856640000000 |
| 9 | 23681690417572387200000000 |
| 10 | 21660852835272876825600000000 |
| 11 | 23175597788788462617600000000000 |
| 12 | 28817200450516396946227200000000000 |
[75,21875,5512500,1512630000,484041600000, 184834742400000,84715923600000000, 46534591303200000000,30489464221856640000000, 23681690417572387200000000, 21660852835272876825600000000, 23175597788788462617600000000000, 28817200450516396946227200000000000] |