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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4371 |
| 3 | 96255 |
| 4 | 1139374 |
| 5 | 9458750 |
| 6 | 9550635 |
| 7 | 63532485 |
| 8 | 347643114 |
| 9 | 356054375 |
| 10 | 1407126890 |
| 11 | 3214743741 |
| 12 | 4221380670 |
| 13 | 4275362520 |
| 14 | 4622913750 |
| 15 | 9287037474 |
| 16 | 12501781215 |
| 17 | 13508418144 |
| 18 | 27416186875 |
| 19 | 75844139371 |
| 20 | 80426400000 |
[1,4371,96255,1139374,9458750,9550635,63532485, 347643114,356054375,1407126890,3214743741, 4221380670,4275362520,4622913750,9287037474, 12501781215,13508418144,27416186875,75844139371, 80426400000] |