The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1001 |
| 4 | 1 |
| 5 | 111001 |
| 6 | 1110001 |
| 7 | 11101001 |
| 8 | 111000001 |
| 9 | 1110111001 |
| 10 | 11110110001 |
| 11 | 111000101001 |
| 12 | 1100100000001 |
| 13 | 10000111111001 |
| 14 | 1110111110001 |
| 15 | 1111101111101001 |
| 16 | 11111111111000001 |
| 17 | 111111111110111001 |
| 18 | 1111111111110110001 |
| 19 | 11111111111000101001 |
[1,1,1,1001,1,111001,1110001,11101001,111000001, 1110111001,11110110001,111000101001,1100100000001, 10000111111001,1110111110001,1111101111101001, 11111111111000001,111111111110111001, 1111111111110110001,11111111111000101001] |