The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 101 |
| 3 | 1111 |
| 4 | 11011 |
| 5 | 111111 |
| 6 | 1110001 |
| 7 | 11111111 |
| 8 | 111100101 |
| 9 | 1111111111 |
| 10 | 11111001101 |
| 11 | 111111111111 |
| 12 | 1111110010001 |
| 13 | 11111111111111 |
| 14 | 111111100110001 |
| 15 | 1111111111101111 |
| 16 | 11111111000000111 |
| 17 | 111111111111111111 |
| 18 | 1111111110011000101 |
| 19 | 11111111111110111111 |
[1,11,101,1111,11011,111111,1110001,11111111, 111100101,1111111111,11111001101,111111111111, 1111110010001,11111111111111,111111100110001, 1111111111101111,11111111000000111, 111111111111111111,1111111110011000101, 11111111111110111111] |