| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 73 |
| 3 | 721 |
| 4 | 5639 |
| 5 | 45162 |
| 6 | 358209 |
| 7 | 2871646 |
| 8 | 22955155 |
| 9 | 183536379 |
| 10 | 1469158622 |
| 11 | 11763937411 |
| 12 | 94210675699 |
| 13 | 754505710941 |
| 14 | 6042768236882 |
| 15 | 48396947691377 |
| 16 | 387618351751497 |
| 17 | 3104512821455985 |
| 18 | 24864750644129585 |
| 19 | 199147883255433840 |
[9,73,721,5639,45162,358209,2871646,22955155, 183536379,1469158622,11763937411,94210675699, 754505710941,6042768236882,48396947691377, 387618351751497,3104512821455985, 24864750644129585,199147883255433840] |