The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 487 |
| 3 | 284490 |
| 4 | 138804750010 |
| 5 | 36614447980107265380005 |
| 6 | 1488687402158277572727530663796523771436167916 |
| 7 | 6851755410566409402388858507918754752119691856571335811091610144283832011776672133933360212 |
[1,5,487,284490,138804750010, 36614447980107265380005, 1488687402158277572727530663796523771436167916, 68517554105664094023888585079187547521196918565713\ 35811091610144283832011776672133933360212] |