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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 487 |
| 3 | 487 |
| 4 | 2581 |
| 5 | 6921 |
| 6 | 2581 |
| 7 | 12373 |
| 8 | 86509 |
| 9 | 86509 |
| 10 | 12373 |
| 11 | 55929 |
| 12 | 919222 |
| 13 | 2919508 |
| 14 | 919222 |
| 15 | 55929 |
| 16 | 241933 |
| 17 | 8638740 |
| 18 | 84434218 |
| 19 | 84434218 |
| 20 | 8638740 |
| 21 | 241933 |
| 22 | 1015889 |
| 23 | 73276865 |
| 24 | 2090202044 |
| 25 | 7084268884 |
| 26 | 2090202044 |
| 27 | 73276865 |
| 28 | 1015889 |
| 29 | 4174941 |
[81,487,487,2581,6921,2581,12373,86509,86509, 12373,55929,919222,2919508,919222,55929,241933, 8638740,84434218,84434218,8638740,241933,1015889, 73276865,2090202044,7084268884,2090202044, 73276865,1015889,4174941] |