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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 17 |
| 2 | 305 |
| 3 | 5473 |
| 4 | 98209 |
| 5 | 1762289 |
| 6 | 31622993 |
| 7 | 567451585 |
| 8 | 10182505537 |
| 9 | 182717648081 |
| 10 | 3278735159921 |
| 11 | 58834515230497 |
| 12 | 1055742538989025 |
| 13 | 18944531186571953 |
| 14 | 339945818819306129 |
| 15 | 6100080207560938369 |
| 16 | 109461497917277584513 |
| 17 | 1964206882303435582865 |
| 18 | 35246262383544562907057 |
[1,17,305,5473,98209,1762289,31622993,567451585, 10182505537,182717648081,3278735159921, 58834515230497,1055742538989025,18944531186571953, 339945818819306129,6100080207560938369, 109461497917277584513,1964206882303435582865, 35246262383544562907057] |