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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 10 |
| 2 | 100 |
| 3 | 101 |
| 4 | 102 |
| 5 | 120 |
| 6 | 201 |
| 7 | 210 |
| 8 | 1002 |
| 9 | 1012 |
| 10 | 1020 |
| 11 | 1021 |
| 12 | 1022 |
| 13 | 1023 |
| 14 | 1032 |
| 15 | 1203 |
| 16 | 1230 |
| 17 | 1302 |
| 18 | 1320 |
| 19 | 2013 |
| 20 | 2031 |
| 21 | 2103 |
| 22 | 2130 |
| 23 | 2301 |
| 24 | 2310 |
| 25 | 3012 |
| 26 | 3021 |
| 27 | 3102 |
| 28 | 3120 |
| 29 | 3201 |
| 30 | 3210 |
| 31 | 10023 |
| 32 | 10032 |
| 33 | 10123 |
| 34 | 10132 |
| 35 | 10203 |
| 36 | 10213 |
| 37 | 10223 |
| 38 | 10230 |
| 39 | 10231 |
| 40 | 10232 |
| 41 | 10233 |
| 42 | 10234 |
| 43 | 10243 |
[0,10,100,101,102,120,201,210,1002,1012,1020,1021, 1022,1023,1032,1203,1230,1302,1320,2013,2031,2103, 2130,2301,2310,3012,3021,3102,3120,3201,3210, 10023,10032,10123,10132,10203,10213,10223,10230, 10231,10232,10233,10234,10243] |