The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 35 |
| 4 | 309 |
| 5 | 3287 |
| 6 | 41005 |
| 7 | 588487 |
| 8 | 9571125 |
| 9 | 174230863 |
| 10 | 3513016445 |
| 11 | 77760961991 |
| 12 | 1875249535941 |
| 13 | 48946667107295 |
| 14 | 1374949148971597 |
| 15 | 41361812577803383 |
| 16 | 1326708910645563669 |
| 17 | 45201102932347559503 |
| 18 | 1630193308027321807133 |
| 19 | 62047171055048539457255 |
[1,1,5,35,309,3287,41005,588487,9571125,174230863, 3513016445,77760961991,1875249535941, 48946667107295,1374949148971597,41361812577803383, 1326708910645563669,45201102932347559503, 1630193308027321807133,62047171055048539457255] |