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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 239 |
| 3 | 15066 |
| 4 | 449677 |
| 5 | 9317846 |
| 6 | 154090507 |
| 7 | 2167109763 |
| 8 | 26799758534 |
| 9 | 297417275848 |
| 10 | 3004658410735 |
| 11 | 27940725989130 |
| 12 | 241350612592135 |
| 13 | 1951440294582041 |
| 14 | 14865802497447044 |
| 15 | 107290958051308517 |
[0,239,15066,449677,9317846,154090507,2167109763, 26799758534,297417275848,3004658410735, 27940725989130,241350612592135,1951440294582041, 14865802497447044,107290958051308517] |