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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1001 |
| 2 | 1002001 |
| 3 | 1003003001 |
| 4 | 1004006004001 |
| 5 | 1005010010005001 |
| 6 | 1006015020015006001 |
| 7 | 1007021035035021007001 |
| 8 | 1008028056070056028008001 |
| 9 | 1009036084126126084036009001 |
| 10 | 1010045120210252210120045010001 |
[1,1001,1002001,1003003001,1004006004001, 1005010010005001,1006015020015006001, 1007021035035021007001,1008028056070056028008001, 1009036084126126084036009001, 1010045120210252210120045010001] |