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| n | a(n) |
|---|---|
| 1 | 128 |
| 2 | 577 |
| 3 | 21305 |
| 4 | 176032 |
| 5 | 4008817 |
| 6 | 44171841 |
| 7 | 806190208 |
| 8 | 10258304689 |
| 9 | 168184756793 |
| 10 | 2301665823616 |
| 11 | 35784406285057 |
| 12 | 508094306671233 |
| 13 | 7692715116119040 |
| 14 | 111277331056067617 |
| 15 | 1662525457133097145 |
[128,577,21305,176032,4008817,44171841,806190208, 10258304689,168184756793,2301665823616, 35784406285057,508094306671233,7692715116119040, 111277331056067617,1662525457133097145] |