| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 47 |
| 3 | 247 |
| 4 | 1247 |
| 5 | 6247 |
| 6 | 31247 |
| 7 | 156247 |
| 8 | 781247 |
| 9 | 3906247 |
| 10 | 19531247 |
| 11 | 97656247 |
| 12 | 488281247 |
| 13 | 2441406247 |
| 14 | 12207031247 |
| 15 | 61035156247 |
| 16 | 305175781247 |
| 17 | 1525878906247 |
| 18 | 7629394531247 |
| 19 | 38146972656247 |
[7,47,247,1247,6247,31247,156247,781247,3906247, 19531247,97656247,488281247,2441406247, 12207031247,61035156247,305175781247, 1525878906247,7629394531247,38146972656247] |