The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 6 |
| 5 | 9 |
| 6 | 10 |
| 7 | 11 |
| 8 | 13 |
| 9 | 14 |
| 10 | 15 |
| 11 | 16 |
| 12 | 17 |
| 13 | 21 |
| 14 | 23 |
| 15 | 24 |
| 16 | 25 |
| 17 | 31 |
| 18 | 35 |
| 19 | 36 |
| 20 | 38 |
| 21 | 40 |
| 22 | 41 |
[0,1,4,6,9,10,11,13,14,15,16,17,21,23,24,25,31,35, 36,38,40,41] |