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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 102 |
| 3 | 258 |
| 4 | 1782 |
| 5 | 12073 |
| 6 | 67976 |
| 7 | 437825 |
| 8 | 2689769 |
| 9 | 16069287 |
| 10 | 100151409 |
| 11 | 617826286 |
| 12 | 3829474681 |
| 13 | 23768872002 |
| 14 | 147448159384 |
| 15 | 915439292568 |
| 16 | 5684596730219 |
| 17 | 35296722920895 |
| 18 | 219214357674061 |
| 19 | 1361365706626785 |
| 20 | 8454876230184285 |
[8,102,258,1782,12073,67976,437825,2689769, 16069287,100151409,617826286,3829474681, 23768872002,147448159384,915439292568, 5684596730219,35296722920895,219214357674061, 1361365706626785,8454876230184285] |