The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 110 |
| 3 | 111 |
| 4 | 10100 |
| 5 | 1111 |
| 6 | 1101000 |
| 7 | 1011111 |
| 8 | 101010000 |
| 9 | 100111111 |
| 10 | 10110100000 |
| 11 | 1101111111 |
| 12 | 1111101000000 |
| 13 | 1110011111111 |
| 14 | 101111010000000 |
| 15 | 111110111111111 |
| 16 | 10101010100000000 |
| 17 | 10111001111111111 |
| 18 | 1101101101000000000 |
| 19 | 11111011111111111 |
| 20 | 111111101010000000000 |
[1,1,110,111,10100,1111,1101000,1011111,101010000, 100111111,10110100000,1101111111,1111101000000, 1110011111111,101111010000000,111110111111111, 10101010100000000,10111001111111111, 1101101101000000000,11111011111111111, 111111101010000000000] |