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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 30 |
| 3 | 1372 |
| 4 | 408599 |
| 5 | 858105364 |
| 6 | 13486744809160 |
| 7 | 1716349328902123738 |
[4,30,1372,408599,858105364,13486744809160, 1716349328902123738] |