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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 9 |
| 4 | 44 |
| 5 | 88 |
| 6 | 99 |
| 7 | 121 |
| 8 | 171 |
| 9 | 212 |
| 10 | 232 |
| 11 | 242 |
| 12 | 252 |
| 13 | 272 |
| 14 | 292 |
| 15 | 333 |
| 16 | 343 |
| 17 | 363 |
| 18 | 404 |
| 19 | 414 |
| 20 | 424 |
| 21 | 444 |
| 22 | 464 |
| 23 | 484 |
| 24 | 525 |
| 25 | 575 |
| 26 | 585 |
| 27 | 616 |
| 28 | 636 |
| 29 | 656 |
| 30 | 666 |
| 31 | 676 |
| 32 | 686 |
| 33 | 696 |
| 34 | 747 |
| 35 | 808 |
| 36 | 828 |
| 37 | 848 |
| 38 | 868 |
| 39 | 888 |
| 40 | 909 |
| 41 | 999 |
| 42 | 1331 |
| 43 | 1881 |
| 44 | 2112 |
| 45 | 2332 |
| 46 | 2552 |
| 47 | 2662 |
| 48 | 2772 |
| 49 | 2992 |
| 50 | 3663 |
| 51 | 3773 |
[4,8,9,44,88,99,121,171,212,232,242,252,272,292, 333,343,363,404,414,424,444,464,484,525,575,585, 616,636,656,666,676,686,696,747,808,828,848,868, 888,909,999,1331,1881,2112,2332,2552,2662,2772, 2992,3663,3773] |