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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 49 |
| 3 | 801 |
| 4 | 13095 |
| 5 | 214083 |
| 6 | 3499929 |
| 7 | 57218481 |
| 8 | 935434575 |
| 9 | 15292923363 |
| 10 | 250015887009 |
| 11 | 4087377035361 |
| 12 | 66822357687255 |
| 13 | 1092443258415843 |
| 14 | 17859774993929289 |
| 15 | 291979981913499441 |
| 16 | 4773425749606899135 |
| 17 | 78038203981259699523 |
| 18 | 1275805176423288314769 |
[3,49,801,13095,214083,3499929,57218481,935434575, 15292923363,250015887009,4087377035361, 66822357687255,1092443258415843,17859774993929289, 291979981913499441,4773425749606899135, 78038203981259699523,1275805176423288314769] |