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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 11 |
| 2 | 101 |
| 3 | 997 |
| 4 | 10007 |
| 5 | 100003 |
| 6 | 1000003 |
| 7 | 9999991 |
| 8 | 100000007 |
| 9 | 1000000007 |
| 10 | 10000000019 |
| 11 | 100000000003 |
| 12 | 999999999989 |
| 13 | 9999999999971 |
| 14 | 99999999999973 |
| 15 | 999999999999989 |
| 16 | 10000000000000061 |
| 17 | 99999999999999997 |
| 18 | 1000000000000000003 |
| 19 | 9999999999999999961 |
[2,11,101,997,10007,100003,1000003,9999991, 100000007,1000000007,10000000019,100000000003, 999999999989,9999999999971,99999999999973, 999999999999989,10000000000000061, 99999999999999997,1000000000000000003, 9999999999999999961] |