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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 1540 |
| 3 | 125512750 |
| 4 | 1250002537502500 |
| 5 | 1250000000501250002500000 |
| 6 | 125000000000000250375000000250000000 |
| 7 | 1250000000000000000005001250000000002500000000000 |
[1,10,1540,125512750,1250002537502500, 1250000000501250002500000, 125000000000000250375000000250000000, 1250000000000000000005001250000000002500000000000] |