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| n | a(n) |
|---|---|
| 0 | 7 |
| 1 | 50 |
| 2 | 707 |
| 3 | 4999 |
| 4 | 70693 |
| 5 | 499850 |
| 6 | 7068593 |
| 7 | 49980001 |
| 8 | 706788607 |
| 9 | 4997500250 |
| 10 | 70671792107 |
| 11 | 499700044999 |
| 12 | 7066472422093 |
| 13 | 49965006999650 |
| 14 | 706576570417193 |
| 15 | 4996000999920001 |
| 16 | 70650590569297207 |
| 17 | 499550134985000450 |
| 18 | 7064352480359303507 |
| 19 | 49950017497500124999 |
[7,50,707,4999,70693,499850,7068593,49980001, 706788607,4997500250,70671792107,499700044999, 7066472422093,49965006999650,706576570417193, 4996000999920001,70650590569297207, 499550134985000450,7064352480359303507, 49950017497500124999] |