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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 281 |
| 3 | 12966 |
| 4 | 522982 |
| 5 | 20172122 |
| 6 | 769984742 |
| 7 | 29335294083 |
| 8 | 1117382129113 |
| 9 | 42561759311020 |
| 10 | 1621239052172632 |
| 11 | 61755945826247147 |
| 12 | 2352403881643092601 |
[6,281,12966,522982,20172122,769984742, 29335294083,1117382129113,42561759311020, 1621239052172632,61755945826247147, 2352403881643092601] |