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| n | a(n) |
|---|---|
| 1 | 3456 |
| 2 | 20404 |
| 3 | 113288 |
| 4 | 743436 |
| 5 | 4634504 |
| 6 | 32110856 |
| 7 | 208211944 |
| 8 | 1482491852 |
| 9 | 9763925800 |
| 10 | 70741188392 |
| 11 | 469704123072 |
| 12 | 3449044260864 |
| 13 | 23022329803976 |
| 14 | 170950844777056 |
| 15 | 1145540286614792 |
| 16 | 8587053971274908 |
| 17 | 57714312161683112 |
[3456,20404,113288,743436,4634504,32110856, 208211944,1482491852,9763925800,70741188392, 469704123072,3449044260864,23022329803976, 170950844777056,1145540286614792,8587053971274908, 57714312161683112] |