The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 111 |
| 3 | 0 |
| 4 | 11111 |
| 5 | 0 |
| 6 | 1111111 |
| 7 | 0 |
| 8 | 111111111 |
| 9 | 0 |
| 10 | 11111111111 |
| 11 | 0 |
| 12 | 1111111111111 |
| 13 | 110000 |
| 14 | 111111111111111 |
| 15 | 11111100 |
| 16 | 11111111110000111 |
| 17 | 1100110000 |
| 18 | 1111111111110111111 |
| 19 | 111111110000 |
| 20 | 111111111100000011111 |
| 21 | 1111000000 |
| 22 | 11111111111100001111111 |
| 23 | 111100001100 |
[1,1,111,0,11111,0,1111111,0,111111111,0, 11111111111,0,1111111111111,110000, 111111111111111,11111100,11111111110000111, 1100110000,1111111111110111111,111111110000, 111111111100000011111,1111000000, 11111111111100001111111,111100001100] |