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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 113 |
| 3 | 5725 |
| 4 | 509729 |
| 5 | 70109269 |
| 6 | 13747568721 |
| 7 | 3638247408429 |
| 8 | 1248754592688193 |
| 9 | 539284011302978597 |
| 10 | 286116175138397606705 |
| 11 | 182918545555610954788989 |
| 12 | 138683263058208603513689441 |
[1,5,113,5725,509729,70109269,13747568721, 3638247408429,1248754592688193,539284011302978597, 286116175138397606705,182918545555610954788989, 138683263058208603513689441] |