The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 6 |
| 3 | 395 |
| 4 | 8592 |
| 5 | 163860 |
| 6 | 2875836 |
| 7 | 47531178 |
| 8 | 753320466 |
| 9 | 11573758019 |
| 10 | 173540942990 |
| 11 | 2551737823936 |
| 12 | 36922336262476 |
| 13 | 527103036641574 |
| 14 | 7439264341235380 |
| 15 | 103963898544212173 |
| 16 | 1440480444975841286 |
| 17 | 19808724383714310896 |
[0,6,395,8592,163860,2875836,47531178,753320466, 11573758019,173540942990,2551737823936, 36922336262476,527103036641574,7439264341235380, 103963898544212173,1440480444975841286, 19808724383714310896] |