The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 142 |
| 5 | 4699 |
| 6 | 77970 |
| 7 | 672506 |
| 8 | 4338248 |
| 9 | 21167201 |
| 10 | 85351595 |
| 11 | 294664274 |
| 12 | 911848844 |
| 13 | 2528561187 |
| 14 | 6501165477 |
[1,142,4699,77970,672506,4338248,21167201, 85351595,294664274,911848844,2528561187, 6501165477] |