The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 68 |
| 4 | 2318 |
| 5 | 191364 |
| 6 | 37322176 |
| 7 | 16851654336 |
| 8 | 17323677619888 |
| 9 | 39991811695203552 |
| 10 | 204958165376127918144 |
| 11 | 2309776412016044230960128 |
| 12 | 56778926016923229432156258048 |
| 13 | 3023733345610004146919028796718592 |
[1,1,5,68,2318,191364,37322176,16851654336, 17323677619888,39991811695203552, 204958165376127918144,2309776412016044230960128, 56778926016923229432156258048, 3023733345610004146919028796718592] |