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A326366 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 28 |
| 5 | 1960 |
| 6 | 1379273 |
| 7 | 229755337549 |
| 8 | 423295079757497714059 |
[1,1,1,2,28,1960,1379273,229755337549, 423295079757497714059] |