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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 306407299538340 |
| 4 | 74580431332898028185458459628980 |
| 5 | 1639181069042816463750016605763302490015414336761600 |
| 6 | 1589885820403830809743559212333580058709307314045492378010426129831107500 |
[0,1,306407299538340, 74580431332898028185458459628980, 16391810690428164637500166057633024900154143367616\ 00, 15898858204038308097435592123335800587093073140454\ 92378010426129831107500] |