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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 1232 |
| 4 | 9168 |
| 5 | 57184 |
| 6 | 382288 |
| 7 | 2485392 |
| 8 | 16340928 |
| 9 | 106947696 |
| 10 | 701265456 |
| 11 | 4594672480 |
| 12 | 30114026544 |
| 13 | 197343497360 |
| 14 | 1293310030272 |
| 15 | 8475616206320 |
| 16 | 55544979901904 |
| 17 | 364012404953344 |
| 18 | 2385549961744304 |
| 19 | 15633651159374128 |
[16,256,1232,9168,57184,382288,2485392,16340928, 106947696,701265456,4594672480,30114026544, 197343497360,1293310030272,8475616206320, 55544979901904,364012404953344,2385549961744304, 15633651159374128] |