The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 111 |
| 4 | 3367 |
| 5 | 7787 |
| 6 | 8517 |
| 7 | 9071 |
| 8 | 54079 |
| 9 | 54451 |
| 10 | 138657 |
| 11 | 262157 |
| 12 | 759461 |
| 13 | 857817 |
| 14 | 4662317 |
| 15 | 21754021 |
| 16 | 25400729 |
| 17 | 41171387 |
| 18 | 50304331 |
| 19 | 368119693 |
| 20 | 799245603 |
| 21 | 938577991 |
[1,7,111,3367,7787,8517,9071,54079,54451,138657, 262157,759461,857817,4662317,21754021,25400729, 41171387,50304331,368119693,799245603,938577991] |