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| n | a(n) |
|---|---|
| 6 | 2 |
| 7 | 29 |
| 8 | 407 |
| 9 | 5856 |
| 10 | 84351 |
| 11 | 1251246 |
| 12 | 19318314 |
| 13 | 311306106 |
| 14 | 5247587002 |
| 15 | 92593553775 |
| 16 | 1709675651881 |
| 17 | 33009644160452 |
| 18 | 665774603385155 |
| 19 | 14011066071814409 |
| 20 | 307285854478257587 |
| 21 | 7014599706534263680 |
| 22 | 166463062283304010885 |
| 23 | 4101715354110043233880 |
| 24 | 104819153609360857542346 |
[2,29,407,5856,84351,1251246,19318314,311306106, 5247587002,92593553775,1709675651881, 33009644160452,665774603385155,14011066071814409, 307285854478257587,7014599706534263680, 166463062283304010885,4101715354110043233880, 104819153609360857542346] |