The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 23 |
| 2 | 2961 |
| 3 | 9798690 |
| 4 | 110528843365255 |
| 5 | 16850689692769666225948933906 |
| 6 | 357017084742873887104901208145335336566095925224005385073 |
| 7 | 137046393407742688281781643318644289249627231296779665713406441509975367310318242383523303176564909084594247359836 |
[2,23,2961,9798690,110528843365255, 16850689692769666225948933906, 35701708474287388710490120814533533656609592522400\ 5385073, 13704639340774268828178164331864428924962723129677\ 96657134064415099753673103182423835233031765649090\ 84594247359836] |