| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 37 |
| 4 | 377 |
| 5 | 4981 |
| 6 | 81305 |
| 7 | 1580797 |
| 8 | 35637377 |
| 9 | 913115701 |
| 10 | 26189790425 |
| 11 | 830916198157 |
| 12 | 28883617580177 |
| 13 | 1091455878504421 |
| 14 | 44541746007215945 |
| 15 | 1952125704702209917 |
| 16 | 91440056107001450177 |
| 17 | 4558596081095404198741 |
[1,5,37,377,4981,81305,1580797,35637377,913115701, 26189790425,830916198157,28883617580177, 1091455878504421,44541746007215945, 1952125704702209917,91440056107001450177, 4558596081095404198741] |