The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 28 |
| 5 | 99 |
| 6 | 433 |
| 7 | 1852 |
| 8 | 8463 |
| 9 | 38797 |
| 10 | 181888 |
| 11 | 858560 |
| 12 | 4093728 |
| 13 | 19636098 |
| 14 | 94758985 |
[1,3,7,28,99,433,1852,8463,38797,181888,858560, 4093728,19636098,94758985] |