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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 163 |
| 3 | 5623 |
| 4 | 235251 |
| 5 | 11009257 |
| 6 | 554159719 |
| 7 | 29359663991 |
| 8 | 1615702377331 |
| 9 | 91558286583757 |
| 10 | 5310712888211413 |
| 11 | 313940484249068761 |
| 12 | 18853030977961798359 |
| 13 | 1147317139889540758509 |
| 14 | 70618205829113737707663 |
| 15 | 4389482803713232076789623 |
| 16 | 275190242843266217113413491 |
[1,7,163,5623,235251,11009257,554159719, 29359663991,1615702377331,91558286583757, 5310712888211413,313940484249068761, 18853030977961798359,1147317139889540758509, 70618205829113737707663,4389482803713232076789623, 275190242843266217113413491] |