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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 19 |
| 3 | 73 |
| 4 | 241 |
| 5 | 411379 |
| 6 | 693110401 |
| 7 | 80746825394092993 |
| 8 | 15848109838244286131940714481 |
| 9 | 12238279486576766124458805567902551228138920205718424019 |
| 10 | 1732765524527243824670663837908764472971413888795440694899 |
| 11 | 20618141429646301085064054485889973597180353561103310272561 |
| 12 | 2919234250884982146911220973819117919577845597870261813393281 |
[7,19,73,241,411379,693110401,80746825394092993, 15848109838244286131940714481, 12238279486576766124458805567902551228138920205718\ 424019, 17327655245272438246706638379087644729714138887954\ 40694899, 20618141429646301085064054485889973597180353561103\ 310272561, 29192342508849821469112209738191179195778455978702\ 61813393281] |