The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 28 |
| 2 | 290 |
| 3 | 19166 |
| 4 | 1278800 |
| 5 | 72702948 |
| 6 | 3504611581 |
| 7 | 149566037863 |
| 8 | 5869938821256 |
| 9 | 214703720602834 |
| 10 | 7351193680736743 |
| 11 | 236553335814113238 |
| 12 | 7188010087534981493 |
| 13 | 207245179249299667005 |
| 14 | 5694522520051954825293 |
[28,290,19166,1278800,72702948,3504611581, 149566037863,5869938821256,214703720602834, 7351193680736743,236553335814113238, 7188010087534981493,207245179249299667005, 5694522520051954825293] |