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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 1791 |
| 3 | 64257 |
| 4 | 1950000 |
| 5 | 60459696 |
| 6 | 1977314738 |
| 7 | 68719456256 |
| 8 | 2541865795524 |
| 9 | 99999999950000 |
| 10 | 4177248169342446 |
| 11 | 184884258894932736 |
| 12 | 8650415919381195128 |
| 13 | 426878854210636550576 |
| 14 | 22168378200531005606250 |
| 15 | 1208925819614629174378496 |
[7,1791,64257,1950000,60459696,1977314738, 68719456256,2541865795524,99999999950000, 4177248169342446,184884258894932736, 8650415919381195128,426878854210636550576, 22168378200531005606250,1208925819614629174378496] |