The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 9 |
| 8 | 18 |
| 9 | 35 |
| 10 | 75 |
| 11 | 159 |
| 12 | 355 |
| 13 | 802 |
| 14 | 1858 |
| 15 | 4347 |
| 16 | 10359 |
| 17 | 24894 |
| 18 | 60523 |
| 19 | 148284 |
| 20 | 366319 |
| 21 | 910726 |
| 22 | 2278658 |
| 23 | 5731580 |
| 24 | 14490245 |
| 25 | 36797588 |
| 26 | 93839412 |
| 27 | 240215803 |
| 28 | 617105614 |
| 29 | 1590507121 |
| 30 | 4111846763 |
| 31 | 10660307791 |
| 32 | 27711253769 |
[1,1,1,1,2,3,5,9,18,35,75,159,355,802,1858,4347, 10359,24894,60523,148284,366319,910726,2278658, 5731580,14490245,36797588,93839412,240215803, 617105614,1590507121,4111846763,10660307791, 27711253769] |