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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 399 |
| 3 | 399 |
| 4 | 1620 |
| 5 | 2577 |
| 6 | 1620 |
| 7 | 6462 |
| 8 | 14781 |
| 9 | 14781 |
| 10 | 6462 |
| 11 | 26481 |
| 12 | 91674 |
| 13 | 141759 |
| 14 | 91674 |
| 15 | 26481 |
| 16 | 110769 |
| 17 | 594348 |
| 18 | 1419921 |
| 19 | 1419921 |
| 20 | 594348 |
| 21 | 110769 |
| 22 | 469617 |
| 23 | 3902463 |
| 24 | 14528199 |
| 25 | 22647363 |
| 26 | 14528199 |
| 27 | 3902463 |
| 28 | 469617 |
| 29 | 2009553 |
| 30 | 25900263 |
| 31 | 150387285 |
[81,399,399,1620,2577,1620,6462,14781,14781,6462, 26481,91674,141759,91674,26481,110769,594348, 1419921,1419921,594348,110769,469617,3902463, 14528199,22647363,14528199,3902463,469617,2009553, 25900263,150387285] |