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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 100 |
| 4 | 1000 |
| 5 | 10000 |
| 6 | 100000 |
| 7 | 1000000 |
| 8 | 10000000 |
| 9 | 100000000 |
| 10 | 2 |
| 11 | 11 |
| 12 | 20 |
| 13 | 101 |
| 14 | 110 |
| 15 | 200 |
| 16 | 1001 |
| 17 | 1010 |
| 18 | 1100 |
| 19 | 1000000000 |
| 20 | 12 |
| 21 | 21 |
| 22 | 30 |
| 23 | 102 |
| 24 | 111 |
| 25 | 120 |
| 26 | 201 |
| 27 | 210 |
| 28 | 2000 |
| 29 | 10000000000 |
| 30 | 22 |
| 31 | 31 |
| 32 | 40 |
| 33 | 103 |
| 34 | 112 |
| 35 | 121 |
| 36 | 130 |
| 37 | 300 |
| 38 | 10001 |
| 39 | 100000000000 |
| 40 | 32 |
| 41 | 41 |
| 42 | 50 |
| 43 | 104 |
| 44 | 113 |
| 45 | 122 |
[1,10,100,1000,10000,100000,1000000,10000000, 100000000,2,11,20,101,110,200,1001,1010,1100, 1000000000,12,21,30,102,111,120,201,210,2000, 10000000000,22,31,40,103,112,121,130,300,10001, 100000000000,32,41,50,104,113,122] |