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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 48 |
| 4 | 436 |
| 5 | 3929 |
| 6 | 35367 |
| 7 | 318310 |
| 8 | 2864798 |
| 9 | 77349555 |
| 10 | 2088437995 |
| 11 | 56387825876 |
| 12 | 1522471298664 |
| 13 | 41106725063941 |
| 14 | 1109881576726421 |
| 15 | 29966802571613382 |
| 16 | 809103669433561330 |
| 17 | 21845799074706155927 |
| 18 | 589836575017066210047 |
[1,5,48,436,3929,35367,318310,2864798,77349555, 2088437995,56387825876,1522471298664, 41106725063941,1109881576726421,29966802571613382, 809103669433561330,21845799074706155927, 589836575017066210047] |