The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 258 |
| 3 | 8274 |
| 4 | 353742 |
| 5 | 18904602 |
| 6 | 1212354798 |
| 7 | 90706565514 |
| 8 | 7756033173342 |
| 9 | 746093257148442 |
| 10 | 79745110236049038 |
| 11 | 9375786203927344554 |
| 12 | 1202540991574287431742 |
| 13 | 167091435183140588426682 |
| 14 | 25003060551369349424359278 |
| 15 | 4008624526767825553573112394 |
[1,12,258,8274,353742,18904602,1212354798, 90706565514,7756033173342,746093257148442, 79745110236049038,9375786203927344554, 1202540991574287431742,167091435183140588426682, 25003060551369349424359278, 4008624526767825553573112394] |