The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 89 |
| 3 | 3620 |
| 4 | 136002 |
| 5 | 5044388 |
| 6 | 186735416 |
| 7 | 6897569624 |
| 8 | 254605651987 |
| 9 | 9394097589045 |
| 10 | 346688563051200 |
| 11 | 12783317143959681 |
| 12 | 471522273648618022 |
| 13 | 17392356171712222007 |
| 14 | 641526227823336378247 |
| 15 | 23663017416745429407437 |
| 16 | 872822255075124794048661 |
[1,1,89,3620,136002,5044388,186735416,6897569624, 254605651987,9394097589045,346688563051200, 12783317143959681,471522273648618022, 17392356171712222007,641526227823336378247, 23663017416745429407437,872822255075124794048661] |