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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 6 |
| 2 | 33 |
| 3 | 1086 |
| 4 | 1179393 |
| 5 | 1390967848446 |
| 6 | 1934791555410494424614913 |
| 7 | 3743418362887760317407541271559358491868341997566 |
[3,6,33,1086,1179393,1390967848446, 1934791555410494424614913, 3743418362887760317407541271559358491868341997566] |