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| n | a(n) |
|---|---|
| 1 | 56 |
| 2 | 608 |
| 3 | 7732 |
| 4 | 151304 |
| 5 | 4093912 |
| 6 | 178269116 |
| 7 | 10603143992 |
| 8 | 1110254693508 |
[56,608,7732,151304,4093912,178269116,10603143992, 1110254693508] |