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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 309 |
| 3 | 2233 |
| 4 | 27609 |
| 5 | 371691 |
| 6 | 4406933 |
| 7 | 56562977 |
| 8 | 728459961 |
| 9 | 9260503697 |
| 10 | 118800214951 |
| 11 | 1524147275433 |
| 12 | 19534446701521 |
| 13 | 250583781238959 |
| 14 | 3214379129443263 |
| 15 | 41229745589418633 |
| 16 | 528882044555348133 |
[13,309,2233,27609,371691,4406933,56562977, 728459961,9260503697,118800214951,1524147275433, 19534446701521,250583781238959,3214379129443263, 41229745589418633,528882044555348133] |