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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 19 |
| 4 | 76 |
| 5 | 539 |
| 6 | 8873 |
| 7 | 505531 |
| 8 | 173789117 |
| 9 | 801854912659 |
| 10 | 157566761299009378 |
| 11 | 6992370157470308367564294 |
| 12 | 780243941119853800883766562690845097 |
| 13 | 7117897437316498836240639309909700742341112693648555 |
[1,3,7,19,76,539,8873,505531,173789117, 801854912659,157566761299009378, 6992370157470308367564294, 780243941119853800883766562690845097, 71178974373164988362406393099097007423411126936485\ 55] |