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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 12 |
| 11 | 21 |
| 12 | 23 |
| 13 | 32 |
| 14 | 34 |
| 15 | 43 |
| 16 | 45 |
| 17 | 54 |
| 18 | 56 |
| 19 | 65 |
| 20 | 67 |
| 21 | 76 |
| 22 | 78 |
| 23 | 87 |
| 24 | 89 |
| 25 | 98 |
| 26 | 123 |
| 27 | 132 |
| 28 | 213 |
| 29 | 231 |
| 30 | 234 |
| 31 | 243 |
| 32 | 312 |
| 33 | 321 |
| 34 | 324 |
| 35 | 342 |
| 36 | 345 |
| 37 | 354 |
| 38 | 423 |
| 39 | 432 |
| 40 | 435 |
| 41 | 453 |
| 42 | 456 |
| 43 | 465 |
| 44 | 534 |
| 45 | 543 |
| 46 | 546 |
| 47 | 564 |
| 48 | 567 |
| 49 | 576 |
| 50 | 645 |
| 51 | 654 |
| 52 | 657 |
| 53 | 675 |
| 54 | 678 |
| 55 | 687 |
| 56 | 756 |
| 57 | 765 |
| 58 | 768 |
| 59 | 786 |
| 60 | 789 |
| 61 | 798 |
| 62 | 867 |
| 63 | 876 |
| 64 | 879 |
| 65 | 897 |
| 66 | 978 |
| 67 | 987 |
[1,2,3,4,5,6,7,8,9,12,21,23,32,34,43,45,54,56,65, 67,76,78,87,89,98,123,132,213,231,234,243,312,321, 324,342,345,354,423,432,435,453,456,465,534,543, 546,564,567,576,645,654,657,675,678,687,756,765, 768,786,789,798,867,876,879,897,978,987] |