The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 17 |
| 3 | 127 |
| 4 | 1045 |
| 5 | 18075 |
| 6 | 242872 |
| 7 | 3570731 |
| 8 | 52303834 |
| 9 | 766622466 |
| 10 | 11271546283 |
| 11 | 165665212660 |
| 12 | 2435912683020 |
| 13 | 35819238408346 |
| 14 | 526724402976581 |
| 15 | 7745695689623062 |
| 16 | 113904017404740204 |
| 17 | 1675017069147795397 |
[0,17,127,1045,18075,242872,3570731,52303834, 766622466,11271546283,165665212660,2435912683020, 35819238408346,526724402976581,7745695689623062, 113904017404740204,1675017069147795397] |