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| n | a(n) |
|---|---|
| 1 | 251 |
| 2 | 431 |
| 3 | 440 |
| 4 | 455 |
| 5 | 493 |
| 6 | 499 |
| 7 | 502 |
| 8 | 547 |
| 9 | 559 |
| 10 | 581 |
| 11 | 583 |
| 12 | 607 |
| 13 | 623 |
[251,431,440,455,493,499,502,547,559,581,583,607, 623] |