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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 55 |
| 4 | 56 |
| 5 | 57 |
| 6 | 58 |
| 7 | 59 |
| 8 | 60 |
| 9 | 61 |
| 10 | 62 |
| 11 | 63 |
| 12 | 487 |
| 13 | 497 |
| 14 | 507 |
| 15 | 517 |
| 16 | 527 |
| 17 | 537 |
| 18 | 547 |
| 19 | 557 |
| 20 | 567 |
| 21 | 4375 |
| 22 | 4384 |
| 23 | 4393 |
| 24 | 4402 |
| 25 | 4411 |
| 26 | 4420 |
| 27 | 4429 |
| 28 | 4438 |
| 29 | 4447 |
| 30 | 4457 |
| 31 | 4466 |
| 32 | 4475 |
| 33 | 4484 |
| 34 | 4493 |
| 35 | 4502 |
| 36 | 4511 |
| 37 | 4520 |
| 38 | 4529 |
| 39 | 4539 |
| 40 | 4548 |
| 41 | 4557 |
| 42 | 4566 |
| 43 | 4575 |
| 44 | 4584 |
[1,7,55,56,57,58,59,60,61,62,63,487,497,507,517, 527,537,547,557,567,4375,4384,4393,4402,4411,4420, 4429,4438,4447,4457,4466,4475,4484,4493,4502,4511, 4520,4529,4539,4548,4557,4566,4575,4584] |