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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 12 |
| 4 | 3 |
| 5 | 13 |
| 6 | 23 |
| 7 | 123 |
| 8 | 4 |
| 9 | 14 |
| 10 | 24 |
| 11 | 124 |
| 12 | 34 |
| 13 | 134 |
| 14 | 234 |
| 15 | 1234 |
| 16 | 5 |
| 17 | 15 |
| 18 | 25 |
| 19 | 125 |
| 20 | 35 |
| 21 | 135 |
| 22 | 235 |
| 23 | 1235 |
| 24 | 45 |
| 25 | 145 |
| 26 | 245 |
| 27 | 1245 |
| 28 | 345 |
| 29 | 1345 |
| 30 | 2345 |
| 31 | 12345 |
| 32 | 6 |
| 33 | 16 |
| 34 | 26 |
| 35 | 126 |
| 36 | 36 |
| 37 | 136 |
| 38 | 236 |
| 39 | 1236 |
| 40 | 46 |
| 41 | 146 |
| 42 | 246 |
| 43 | 1246 |
| 44 | 346 |
| 45 | 1346 |
| 46 | 2346 |
| 47 | 12346 |
| 48 | 56 |
| 49 | 156 |
| 50 | 256 |
| 51 | 1256 |
| 52 | 356 |
| 53 | 1356 |
[0,1,2,12,3,13,23,123,4,14,24,124,34,134,234,1234, 5,15,25,125,35,135,235,1235,45,145,245,1245,345, 1345,2345,12345,6,16,26,126,36,136,236,1236,46, 146,246,1246,346,1346,2346,12346,56,156,256,1256, 356,1356] |