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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 101 |
| 5 | 101 |
| 6 | 10101 |
| 7 | 11101 |
| 8 | 1001001 |
| 9 | 1001001 |
| 10 | 101001001 |
| 11 | 111001001 |
| 12 | 10010001001 |
| 13 | 10010101001 |
| 14 | 1010010101001 |
| 15 | 1110010101001 |
| 16 | 100100011101001 |
| 17 | 100101001001001 |
| 18 | 10100101001001001 |
| 19 | 11100101001001001 |
| 20 | 1001000111001001001 |
| 21 | 1001010010001001001 |
[1,1,1,1,101,101,10101,11101,1001001,1001001, 101001001,111001001,10010001001,10010101001, 1010010101001,1110010101001,100100011101001, 100101001001001,10100101001001001, 11100101001001001,1001000111001001001, 1001010010001001001] |