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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 57 |
| 3 | 57 |
| 4 | 180 |
| 5 | 411 |
| 6 | 180 |
| 7 | 621 |
| 8 | 2318 |
| 9 | 2318 |
| 10 | 621 |
| 11 | 2061 |
| 12 | 14641 |
| 13 | 20958 |
| 14 | 14641 |
| 15 | 2061 |
| 16 | 6966 |
| 17 | 88103 |
| 18 | 224156 |
| 19 | 224156 |
| 20 | 88103 |
| 21 | 6966 |
| 22 | 23355 |
| 23 | 541936 |
| 24 | 2227254 |
| 25 | 4207437 |
| 26 | 2227254 |
| 27 | 541936 |
| 28 | 23355 |
| 29 | 78597 |
| 30 | 3302001 |
| 31 | 22904858 |
| 32 | 72246797 |
| 33 | 72246797 |
| 34 | 22904858 |
| 35 | 3302001 |
[15,57,57,180,411,180,621,2318,2318,621,2061, 14641,20958,14641,2061,6966,88103,224156,224156, 88103,6966,23355,541936,2227254,4207437,2227254, 541936,23355,78597,3302001,22904858,72246797, 72246797,22904858,3302001] |