The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 43 |
| 3 | 762 |
| 4 | 19573 |
| 5 | 672374 |
| 6 | 29390733 |
| 7 | 1578973510 |
| 8 | 101612589283 |
| 9 | 7679375658354 |
| 10 | 670906936259299 |
| 11 | 66891320576455142 |
| 12 | 7530075312966689409 |
| 13 | 948460025747139087802 |
| 14 | 132635012110499511683869 |
| 15 | 20454728573277460691412006 |
| 16 | 3458323793329321035116835859 |
| 17 | 637694404371402843143395980434 |
| 18 | 127650318560095585201739965521651 |
[1,4,43,762,19573,672374,29390733,1578973510, 101612589283,7679375658354,670906936259299, 66891320576455142,7530075312966689409, 948460025747139087802,132635012110499511683869, 20454728573277460691412006, 3458323793329321035116835859, 637694404371402843143395980434, 127650318560095585201739965521651] |