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| n | a(n) |
|---|---|
| 1 | 676 |
| 2 | 2704 |
| 3 | 14161 |
| 4 | 66049 |
| 5 | 309136 |
| 6 | 1485961 |
| 7 | 7070281 |
| 8 | 33686416 |
| 9 | 161417025 |
| 10 | 772006225 |
| 11 | 3690562500 |
| 12 | 17654436900 |
| 13 | 84443710464 |
| 14 | 403869147049 |
| 15 | 1931769194161 |
| 16 | 9239867281225 |
| 17 | 44194454747881 |
| 18 | 211385283419025 |
| 19 | 1011072102969600 |
[676,2704,14161,66049,309136,1485961,7070281, 33686416,161417025,772006225,3690562500, 17654436900,84443710464,403869147049, 1931769194161,9239867281225,44194454747881, 211385283419025,1011072102969600] |