The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 49 |
| 4 | 697 |
| 5 | 12881 |
| 6 | 291901 |
| 7 | 7823425 |
| 8 | 241878449 |
| 9 | 8469678817 |
| 10 | 331194361141 |
| 11 | 14301627569681 |
| 12 | 675802760007145 |
| 13 | 34681947121134769 |
| 14 | 1920727213363900397 |
| 15 | 114166002761833118881 |
| 16 | 7248797582463164166241 |
| 17 | 489621781318487529974465 |
[1,1,5,49,697,12881,291901,7823425,241878449, 8469678817,331194361141,14301627569681, 675802760007145,34681947121134769, 1920727213363900397,114166002761833118881, 7248797582463164166241,489621781318487529974465] |