The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 8 |
| 6 | 8 |
| 7 | 35 |
| 8 | 16 |
| 9 | 51 |
| 10 | 145 |
| 11 | 1112 |
| 12 | 1145 |
| 13 | 10929 |
| 14 | 41400 |
| 15 | 542785 |
| 16 | 40384 |
| 17 | 583169 |
| 18 | 2781808 |
| 19 | 48558706 |
| 20 | 65461347 |
| 21 | 1277941540 |
| 22 | 7370563251 |
| 23 | 159694747220 |
| 24 | 63387056365 |
| 25 | 1500631724572 |
| 26 | 10152855622657 |
[1,2,2,2,8,8,35,16,51,145,1112,1145,10929,41400, 542785,40384,583169,2781808,48558706,65461347, 1277941540,7370563251,159694747220,63387056365, 1500631724572,10152855622657] |