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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 1793 |
| 4 | 10812 |
| 5 | 68064 |
| 6 | 423606 |
| 7 | 2613530 |
| 8 | 16035624 |
| 9 | 97883197 |
| 10 | 595766564 |
| 11 | 3617770796 |
| 12 | 21938495472 |
| 13 | 132905120076 |
| 14 | 804648760664 |
| 15 | 4869522949489 |
| 16 | 29461013798230 |
| 17 | 178208981945456 |
| 18 | 1077853513894740 |
| 19 | 6518619188201742 |
[16,256,1793,10812,68064,423606,2613530,16035624, 97883197,595766564,3617770796,21938495472, 132905120076,804648760664,4869522949489, 29461013798230,178208981945456,1077853513894740, 6518619188201742] |