The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 21 |
| 3 | 2403 |
| 4 | 1500183 |
| 5 | 5110723191 |
| 6 | 95013316876491 |
| 7 | 9639473169171326643 |
| 8 | 5336900216006709884938623 |
| 9 | 16124704040675904181778734982451 |
| 10 | 265865038636937159336134567410478299051 |
[1,21,2403,1500183,5110723191,95013316876491, 9639473169171326643,5336900216006709884938623, 16124704040675904181778734982451, 265865038636937159336134567410478299051] |