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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 16 |
| 3 | 1004 |
| 4 | 3097044 |
| 5 | 17870117305627 |
| 6 | 326491281627156186523088120 |
| 7 | 129799108378079059801835178977925051122700746471817654 |
[3,16,1004,3097044,17870117305627, 326491281627156186523088120, 12979910837807905980183517897792505112270074647181\ 7654] |