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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 27 |
| 3 | 45 |
| 4 | 63 |
| 5 | 65 |
| 6 | 69 |
| 7 | 81 |
| 8 | 87 |
| 9 | 201 |
| 10 | 207 |
| 11 | 211 |
| 12 | 213 |
| 13 | 218 |
| 14 | 219 |
| 15 | 225 |
| 16 | 231 |
| 17 | 235 |
| 18 | 237 |
| 19 | 238 |
[21,27,45,63,65,69,81,87,201,207,211,213,218,219, 225,231,235,237,238] |