The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 37 |
| 4 | 110 |
| 5 | 272 |
| 6 | 598 |
| 7 | 1213 |
| 8 | 2323 |
| 9 | 4265 |
| 10 | 7588 |
| 11 | 13184 |
| 12 | 22500 |
| 13 | 37881 |
| 14 | 63125 |
| 15 | 104381 |
| 16 | 171602 |
| 17 | 280896 |
| 18 | 458330 |
| 19 | 746085 |
| 20 | 1212415 |
| 21 | 1967761 |
| 22 | 3190824 |
| 23 | 5170752 |
| 24 | 8375400 |
| 25 | 13561777 |
| 26 | 21954753 |
| 27 | 35536213 |
| 28 | 57512918 |
| 29 | 93073520 |
| 30 | 150613438 |
[1,9,37,110,272,598,1213,2323,4265,7588,13184, 22500,37881,63125,104381,171602,280896,458330, 746085,1212415,1967761,3190824,5170752,8375400, 13561777,21954753,35536213,57512918,93073520, 150613438] |