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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 7 |
| 3 | 15 |
| 4 | 47 |
| 5 | 81 |
| 6 | 115 |
| 7 | 267 |
| 8 | 285 |
| 9 | 7641 |
| 10 | 19089 |
| 11 | 25831 |
| 12 | 32115 |
| 13 | 59811 |
| 14 | 70155 |
| 15 | 178715 |
[5,7,15,47,81,115,267,285,7641,19089,25831,32115, 59811,70155,178715] |