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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 518 |
| 3 | 518 |
| 4 | 3550 |
| 5 | 3318 |
| 6 | 3550 |
| 7 | 23524 |
| 8 | 25062 |
| 9 | 25062 |
| 10 | 23524 |
| 11 | 157476 |
| 12 | 181308 |
| 13 | 241548 |
| 14 | 181308 |
| 15 | 157476 |
| 16 | 1051870 |
| 17 | 1284808 |
| 18 | 2113406 |
| 19 | 2113406 |
| 20 | 1284808 |
| 21 | 1051870 |
| 22 | 7027770 |
| 23 | 9172142 |
| 24 | 17719343 |
| 25 | 21509980 |
| 26 | 17719343 |
| 27 | 9172142 |
| 28 | 7027770 |
| 29 | 46953514 |
| 30 | 65613880 |
[81,518,518,3550,3318,3550,23524,25062,25062, 23524,157476,181308,241548,181308,157476,1051870, 1284808,2113406,2113406,1284808,1051870,7027770, 9172142,17719343,21509980,17719343,9172142, 7027770,46953514,65613880] |