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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 86 |
| 3 | 671 |
| 4 | 5696 |
| 5 | 49872 |
| 6 | 430522 |
| 7 | 3713779 |
| 8 | 32095222 |
| 9 | 277299810 |
| 10 | 2395400876 |
| 11 | 20693860360 |
| 12 | 178774685507 |
| 13 | 1544423015390 |
| 14 | 13342196998602 |
| 15 | 115262678365111 |
| 16 | 995749100272238 |
| 17 | 8602231678929970 |
| 18 | 74314295339427502 |
| 19 | 641997874601748641 |
[7,86,671,5696,49872,430522,3713779,32095222, 277299810,2395400876,20693860360,178774685507, 1544423015390,13342196998602,115262678365111, 995749100272238,8602231678929970, 74314295339427502,641997874601748641] |