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| n | a(n) |
|---|---|
| 1 | 1256 |
| 2 | 7356 |
| 3 | 44828 |
| 4 | 272828 |
| 5 | 1668300 |
| 6 | 10006572 |
| 7 | 61521086 |
| 8 | 369916012 |
| 9 | 2269219612 |
| 10 | 13640047444 |
| 11 | 83744336902 |
| 12 | 503289951172 |
| 13 | 3089491881388 |
| 14 | 18568951596028 |
| 15 | 113990187566058 |
| 16 | 685097693973988 |
| 17 | 4205677467677088 |
| 18 | 25276889819728684 |
[1256,7356,44828,272828,1668300,10006572,61521086, 369916012,2269219612,13640047444,83744336902, 503289951172,3089491881388,18568951596028, 113990187566058,685097693973988,4205677467677088, 25276889819728684] |