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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 239 |
| 3 | 4104 |
| 4 | 62507 |
| 5 | 817653 |
| 6 | 9782242 |
| 7 | 117867542 |
| 8 | 1504100224 |
| 9 | 20036576547 |
| 10 | 268650529838 |
| 11 | 3533651482495 |
| 12 | 45103479980980 |
| 13 | 557665091509317 |
| 14 | 6693711518462620 |
[0,239,4104,62507,817653,9782242,117867542, 1504100224,20036576547,268650529838,3533651482495, 45103479980980,557665091509317,6693711518462620] |