The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 3 |
| 6 | 2 |
| 7 | 1 |
| 8 | 5 |
| 9 | 6 |
| 10 | 9 |
| 11 | 31 |
| 12 | 44 |
| 13 | 18 |
| 14 | 71 |
| 15 | 81 |
| 16 | 1097 |
| 17 | 64 |
| 18 | 789 |
| 19 | 42 |
| 20 | 17 |
| 21 | 908 |
| 22 | 722 |
| 23 | 1500 |
| 24 | 1496 |
| 25 | 5690 |
| 26 | 6720 |
| 27 | 3340 |
| 28 | 18768 |
| 29 | 9597 |
| 30 | 13835 |
[1,1,2,1,3,2,1,5,6,9,31,44,18,71,81,1097,64,789, 42,17,908,722,1500,1496,5690,6720,3340,18768,9597, 13835] |