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| n | a(n) |
|---|---|
| 1 | 123 |
| 2 | 124 |
| 3 | 132 |
| 4 | 135 |
| 5 | 142 |
| 6 | 145 |
| 7 | 153 |
| 8 | 154 |
| 9 | 213 |
| 10 | 214 |
| 11 | 231 |
| 12 | 236 |
| 13 | 241 |
| 14 | 246 |
| 15 | 263 |
| 16 | 264 |
| 17 | 312 |
| 18 | 315 |
| 19 | 321 |
| 20 | 326 |
| 21 | 351 |
| 22 | 356 |
| 23 | 362 |
| 24 | 365 |
| 25 | 412 |
| 26 | 415 |
| 27 | 421 |
| 28 | 426 |
| 29 | 451 |
| 30 | 456 |
| 31 | 462 |
| 32 | 465 |
| 33 | 513 |
| 34 | 514 |
| 35 | 531 |
| 36 | 536 |
| 37 | 541 |
| 38 | 546 |
| 39 | 563 |
| 40 | 564 |
| 41 | 623 |
| 42 | 624 |
| 43 | 632 |
| 44 | 635 |
| 45 | 642 |
| 46 | 645 |
| 47 | 653 |
| 48 | 654 |
[123,124,132,135,142,145,153,154,213,214,231,236, 241,246,263,264,312,315,321,326,351,356,362,365, 412,415,421,426,451,456,462,465,513,514,531,536, 541,546,563,564,623,624,632,635,642,645,653,654] |