The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 101 |
| 5 | 0 |
| 6 | 10101 |
| 7 | 1000 |
| 8 | 1001001 |
| 9 | 1000 |
| 10 | 101001001 |
| 11 | 10001000 |
| 12 | 10010001001 |
| 13 | 10101000 |
| 14 | 1010010101001 |
| 15 | 100010101000 |
| 16 | 100100010101001 |
| 17 | 101010101000 |
| 18 | 10100100010101001 |
| 19 | 1000101010101000 |
| 20 | 1001000100010101001 |
| 21 | 1010101010101000 |
| 22 | 101001010100010101001 |
[1,0,1,0,101,0,10101,1000,1001001,1000,101001001, 10001000,10010001001,10101000,1010010101001, 100010101000,100100010101001,101010101000, 10100100010101001,1000101010101000, 1001000100010101001,1010101010101000, 101001010100010101001] |