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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 12 |
| 3 | 22 |
| 4 | 31 |
| 5 | 41 |
| 6 | 52 |
| 7 | 61 |
| 8 | 62 |
| 9 | 71 |
| 10 | 72 |
| 11 | 81 |
| 12 | 82 |
| 13 | 92 |
| 14 | 101 |
| 15 | 112 |
| 16 | 121 |
| 17 | 122 |
| 18 | 131 |
| 19 | 142 |
| 20 | 151 |
| 21 | 152 |
| 22 | 162 |
| 23 | 172 |
| 24 | 181 |
| 25 | 191 |
| 26 | 192 |
| 27 | 202 |
| 28 | 211 |
| 29 | 212 |
| 30 | 232 |
| 31 | 241 |
| 32 | 242 |
| 33 | 251 |
| 34 | 262 |
| 35 | 271 |
| 36 | 272 |
| 37 | 273 |
| 38 | 281 |
| 39 | 292 |
| 40 | 302 |
| 41 | 311 |
| 42 | 331 |
| 43 | 332 |
| 44 | 352 |
| 45 | 361 |
| 46 | 362 |
| 47 | 382 |
| 48 | 392 |
| 49 | 401 |
| 50 | 412 |
| 51 | 421 |
| 52 | 422 |
| 53 | 431 |
| 54 | 432 |
| 55 | 452 |
[11,12,22,31,41,52,61,62,71,72,81,82,92,101,112, 121,122,131,142,151,152,162,172,181,191,192,202, 211,212,232,241,242,251,262,271,272,273,281,292, 302,311,331,332,352,361,362,382,392,401,412,421, 422,431,432,452] |