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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 20 |
| 3 | 24 |
| 4 | 35 |
| 5 | 40 |
| 6 | 51 |
| 7 | 52 |
| 8 | 88 |
| 9 | 91 |
| 10 | 115 |
| 11 | 123 |
| 12 | 148 |
| 13 | 187 |
| 14 | 232 |
| 15 | 235 |
| 16 | 267 |
| 17 | 403 |
| 18 | 427 |
[15,20,24,35,40,51,52,88,91,115,123,148,187,232, 235,267,403,427] |