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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 15 |
| 2 | 4095 |
| 3 | 765765 |
| 4 | 111035925 |
| 5 | 78058255275 |
| 6 | 24536311574775 |
| 7 | 81926744348173725 |
| 8 | 154923473562396513975 |
| 9 | 154923473562396513975 |
| 10 | 595232293160786606325 |
| 11 | 76784965817741472215925 |
| 12 | 321191512015612578279214275 |
| 13 | 3146713243216956429401462252175 |
| 14 | 342991743510648250804759385487075 |
[1,15,4095,765765,111035925,78058255275, 24536311574775,81926744348173725, 154923473562396513975,154923473562396513975, 595232293160786606325,76784965817741472215925, 321191512015612578279214275, 3146713243216956429401462252175, 342991743510648250804759385487075] |