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| n | a(n) |
|---|---|
| 0 | 31 |
| 1 | 310 |
| 2 | 311 |
| 3 | 31010 |
| 4 | 3110 |
| 5 | 31111 |
| 6 | 310101010 |
| 7 | 3110110 |
| 8 | 311110 |
| 9 | 311111111 |
| 10 | 301 |
| 11 | 310 |
| 12 | 31010101010101010 |
| 13 | 3110110110110 |
| 14 | 31111011110 |
| 15 | 3010 |
| 16 | 3100 |
| 17 | 3111111110 |
| 18 | 31111111111111111 |
| 19 | 3011111 |
| 20 | 3101111 |
| 21 | 3110111 |
| 22 | 3111011 |
| 23 | 3111101 |
| 24 | 3111110 |
| 25 | 3010 |
| 26 | 30101 |
| 27 | 31010 |
[31,310,311,31010,3110,31111,310101010,3110110, 311110,311111111,301,310,31010101010101010, 3110110110110,31111011110,3010,3100,3111111110, 31111111111111111,3011111,3101111,3110111,3111011, 3111101,3111110,3010,30101,31010] |