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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 771 |
| 4 | 95915479 |
| 5 | 1414114479 |
| 6 | 9549447479 |
| 7 | 9997777479 |
| 8 | 44175549479 |
| 9 | 444714977479 |
| 10 | 744411947479 |
| 11 | 7719779447479 |
| 12 | 9755999159479 |
| 13 | 9795711159479 |
| 14 | 9955779977479 |
| 15 | 9974955915479 |
| 16 | 9975759415479 |
| 17 | 44711911155479 |
| 18 | 77174797777479 |
| 19 | 99571459159479 |
| 20 | 757941917114479 |
| 21 | 957974171959479 |
| 22 | 999597777979479 |
| 23 | 999747957114479 |
[1,7,771,95915479,1414114479,9549447479, 9997777479,44175549479,444714977479,744411947479, 7719779447479,9755999159479,9795711159479, 9955779977479,9974955915479,9975759415479, 44711911155479,77174797777479,99571459159479, 757941917114479,957974171959479,999597777979479, 999747957114479] |