The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 4 | 2426 |
| 5 | 57152 |
| 6 | 1014458 |
| 7 | 16353152 |
| 8 | 253359866 |
| 9 | 3857162432 |
| 10 | 58255767098 |
| 11 | 876627759872 |
| 12 | 13168963989626 |
| 13 | 197671319438912 |
| 14 | 2966027888106938 |
| 15 | 44497125235352192 |
| 16 | 667503827640776186 |
| 17 | 10012886060527865792 |
| 18 | 150195591435759857978 |
| 19 | 2252949975250575898112 |
[2426,57152,1014458,16353152,253359866,3857162432, 58255767098,876627759872,13168963989626, 197671319438912,2966027888106938, 44497125235352192,667503827640776186, 10012886060527865792,150195591435759857978, 2252949975250575898112] |