The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 76 |
| 5 | 521 |
| 6 | 39603 |
| 7 | 271443 |
| 8 | 33385282 |
| 9 | 370248451 |
| 10 | 688846502588399 |
| 11 | 71420983074726546239 |
| 12 | 22291846172619859445381409012498 |
| 13 | 6957708846765958465433550193562787551898761 |
[1,3,11,76,521,39603,271443,33385282,370248451, 688846502588399,71420983074726546239, 22291846172619859445381409012498, 6957708846765958465433550193562787551898761] |