The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 13 |
| 4 | 10 |
| 5 | 121 |
| 6 | 91 |
| 7 | 1093 |
| 8 | 820 |
| 9 | 9841 |
| 10 | 7381 |
| 11 | 88573 |
| 12 | 66430 |
| 13 | 797161 |
| 14 | 597871 |
| 15 | 7174453 |
| 16 | 5380840 |
| 17 | 64570081 |
| 18 | 48427561 |
| 19 | 581130733 |
| 20 | 435848050 |
| 21 | 5230176601 |
| 22 | 3922632451 |
| 23 | 47071589413 |
| 24 | 35303692060 |
| 25 | 423644304721 |
| 26 | 317733228541 |
| 27 | 3812798742493 |
| 28 | 2859599056870 |
[0,1,1,13,10,121,91,1093,820,9841,7381,88573, 66430,797161,597871,7174453,5380840,64570081, 48427561,581130733,435848050,5230176601, 3922632451,47071589413,35303692060,423644304721, 317733228541,3812798742493,2859599056870] |