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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 1600 |
| 4 | 8900 |
| 5 | 52748 |
| 6 | 308266 |
| 7 | 1771206 |
| 8 | 10113920 |
| 9 | 57346260 |
| 10 | 324067185 |
| 11 | 1825263206 |
| 12 | 10263448463 |
| 13 | 57624947058 |
| 14 | 323275736469 |
| 15 | 1812337219071 |
| 16 | 10156258833298 |
| 17 | 56897386342175 |
| 18 | 318690256627687 |
| 19 | 1784770177500610 |
[16,256,1600,8900,52748,308266,1771206,10113920, 57346260,324067185,1825263206,10263448463, 57624947058,323275736469,1812337219071, 10156258833298,56897386342175,318690256627687, 1784770177500610] |