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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 225 |
| 3 | 1003003001 |
| 4 | 2154335931602036919361 |
| 5 | 7754752485988106582786291510397200232607 |
| 6 | 84466085320679991847325449027117479144218810924905247445943615969 |
[2,225,1003003001,2154335931602036919361, 7754752485988106582786291510397200232607, 84466085320679991847325449027117479144218810924905\ 247445943615969] |