The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 13 |
| 6 | 36 |
| 7 | 99 |
| 8 | 301 |
| 9 | 980 |
| 10 | 3345 |
| 11 | 12036 |
| 12 | 45399 |
| 13 | 178420 |
| 14 | 729149 |
[0,1,3,5,13,36,99,301,980,3345,12036,45399,178420, 729149] |