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| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 1352 |
| 3 | 7398 |
| 4 | 42474 |
| 5 | 246644 |
| 6 | 1457838 |
| 7 | 8652288 |
| 8 | 51729960 |
| 9 | 309766574 |
| 10 | 1861078542 |
| 11 | 11188735904 |
| 12 | 67373917686 |
| 13 | 405827135812 |
| 14 | 2446512539772 |
| 15 | 14751429933454 |
| 16 | 88985114027282 |
| 17 | 536854786667932 |
| 18 | 3239769624524494 |
[256,1352,7398,42474,246644,1457838,8652288, 51729960,309766574,1861078542,11188735904, 67373917686,405827135812,2446512539772, 14751429933454,88985114027282,536854786667932, 3239769624524494] |