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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 101 |
| 5 | 101 |
| 6 | 10001 |
| 7 | 10101 |
| 8 | 1000001 |
| 9 | 1011101 |
| 10 | 100011001 |
| 11 | 101011001 |
| 12 | 10000011001 |
| 13 | 10111000001 |
| 14 | 1000110011101 |
| 15 | 1010110011001 |
| 16 | 100000110001001 |
| 17 | 101110010101001 |
| 18 | 10001100010101001 |
| 19 | 10101101010101001 |
| 20 | 1000001100010101001 |
| 21 | 1011100101010101001 |
[1,1,1,1,101,101,10001,10101,1000001,1011101, 100011001,101011001,10000011001,10111000001, 1000110011101,1010110011001,100000110001001, 101110010101001,10001100010101001, 10101101010101001,1000001100010101001, 1011100101010101001] |