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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 85 |
| 3 | 1165 |
| 4 | 16829 |
| 5 | 250422 |
| 6 | 3798199 |
| 7 | 58380840 |
| 8 | 906219405 |
| 9 | 14173518325 |
| 10 | 223009006090 |
| 11 | 3525971612830 |
| 12 | 55973720349695 |
| 13 | 891583186291480 |
| 14 | 14242824447215400 |
| 15 | 228094787567204880 |
| 16 | 3660841476461283885 |
| 17 | 58867980292782225855 |
| 18 | 948234279492305885935 |
| 19 | 15297177348002010962803 |
[1,7,85,1165,16829,250422,3798199,58380840, 906219405,14173518325,223009006090,3525971612830, 55973720349695,891583186291480,14242824447215400, 228094787567204880,3660841476461283885, 58867980292782225855,948234279492305885935, 15297177348002010962803] |