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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 21 |
| 3 | 36 |
| 4 | 51 |
| 5 | 63 |
| 6 | 84 |
| 7 | 96 |
| 8 | 117 |
| 9 | 138 |
| 10 | 165 |
| 11 | 177 |
| 12 | 204 |
| 13 | 216 |
| 14 | 240 |
| 15 | 273 |
| 16 | 306 |
| 17 | 318 |
| 18 | 351 |
| 19 | 363 |
[12,21,36,51,63,84,96,117,138,165,177,204,216,240, 273,306,318,351,363] |