The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 12 |
| 8 | 25 |
| 9 | 51 |
| 10 | 111 |
| 11 | 244 |
| 12 | 543 |
| 13 | 1219 |
| 14 | 2783 |
| 15 | 6352 |
| 16 | 14763 |
| 17 | 34208 |
| 18 | 80271 |
| 19 | 188517 |
| 20 | 446696 |
| 21 | 1057534 |
| 22 | 2527328 |
| 23 | 6029096 |
| 24 | 14488609 |
| 25 | 34792504 |
| 26 | 84059268 |
| 27 | 202861050 |
| 28 | 492369844 |
| 29 | 1193743829 |
| 30 | 2907834039 |
| 31 | 7078295983 |
| 32 | 17300759883 |
| 33 | 42248522887 |
| 34 | 103574837980 |
[1,1,1,2,3,6,12,25,51,111,244,543,1219,2783,6352, 14763,34208,80271,188517,446696,1057534,2527328, 6029096,14488609,34792504,84059268,202861050, 492369844,1193743829,2907834039,7078295983, 17300759883,42248522887,103574837980] |