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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 57 |
| 4 | 26 |
| 5 | 216145205 |
| 6 | 1232644 |
| 7 | 16412938630073477961847 |
| 8 | 1678453230184 |
| 9 | 5043695769339201738285763848771292 |
| 10 | 38634088549546746345278764872265967473783 |
[1,4,57,26,216145205,1232644, 16412938630073477961847,1678453230184, 5043695769339201738285763848771292, 38634088549546746345278764872265967473783] |