The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 5 |
| 3 | 73 |
| 4 | 857 |
| 5 | 9505 |
| 6 | 103341 |
| 7 | 1114969 |
| 8 | 11996209 |
| 9 | 128989249 |
| 10 | 1387480981 |
| 11 | 14937170089 |
| 12 | 160978217225 |
| 13 | 1736820843233 |
| 14 | 18760031574077 |
| 15 | 202856430706617 |
| 16 | 2195832009812065 |
| 17 | 23792481053343361 |
| 18 | 258038743598973477 |
[5,73,857,9505,103341,1114969,11996209,128989249, 1387480981,14937170089,160978217225,1736820843233, 18760031574077,202856430706617,2195832009812065, 23792481053343361,258038743598973477] |