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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 518 |
| 3 | 518 |
| 4 | 3550 |
| 5 | 6530 |
| 6 | 3550 |
| 7 | 23524 |
| 8 | 83884 |
| 9 | 83884 |
| 10 | 23524 |
| 11 | 157476 |
| 12 | 1076964 |
| 13 | 2240030 |
| 14 | 1076964 |
| 15 | 157476 |
| 16 | 1051870 |
| 17 | 13552198 |
| 18 | 57696638 |
| 19 | 57696638 |
| 20 | 13552198 |
| 21 | 1051870 |
| 22 | 7027770 |
| 23 | 172901292 |
| 24 | 1480378584 |
| 25 | 3121388776 |
| 26 | 1480378584 |
| 27 | 172901292 |
[81,518,518,3550,6530,3550,23524,83884,83884, 23524,157476,1076964,2240030,1076964,157476, 1051870,13552198,57696638,57696638,13552198, 1051870,7027770,172901292,1480378584,3121388776, 1480378584,172901292] |