The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 441 |
| 3 | 3633 |
| 4 | 41433 |
| 5 | 422541 |
| 6 | 4503765 |
| 7 | 47178453 |
| 8 | 497691495 |
| 9 | 5235328875 |
| 10 | 55135304931 |
| 11 | 580377874461 |
| 12 | 6110484281013 |
| 13 | 64328902346583 |
| 14 | 677252632373457 |
| 15 | 7129999455655041 |
| 16 | 75063819603876579 |
| 17 | 790261545306328809 |
[21,441,3633,41433,422541,4503765,47178453, 497691495,5235328875,55135304931,580377874461, 6110484281013,64328902346583,677252632373457, 7129999455655041,75063819603876579, 790261545306328809] |