The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 4 |
| 4 | 4 |
| 5 | 6 |
| 6 | 6 |
| 7 | 8 |
| 8 | 9 |
| 9 | 10 |
| 10 | 10 |
| 11 | 12 |
| 12 | 12 |
| 13 | 14 |
| 14 | 15 |
| 15 | 16 |
| 16 | 17 |
| 17 | 18 |
| 18 | 18 |
| 19 | 20 |
| 20 | 21 |
| 21 | 22 |
| 22 | 23 |
| 23 | 24 |
| 24 | 25 |
| 25 | 26 |
| 26 | 26 |
| 27 | 28 |
| 28 | 29 |
| 29 | 30 |
[1,4,4,4,6,6,8,9,10,10,12,12,14,15,16,17,18,18,20, 21,22,23,24,25,26,26,28,29,30] |