The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 3 | 2 |
| 4 | 49 |
| 5 | 1244 |
| 6 | 12329 |
| 7 | 81900 |
| 8 | 398907 |
| 9 | 1562362 |
| 10 | 5153001 |
| 11 | 14907120 |
| 12 | 38753358 |
| 13 | 92417760 |
| 14 | 204977323 |
| 15 | 427812496 |
| 16 | 847346181 |
| 17 | 1604300270 |
[2,49,1244,12329,81900,398907,1562362,5153001, 14907120,38753358,92417760,204977323,427812496, 847346181,1604300270] |