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| n | a(n) |
|---|---|
| 1 | 52 |
| 2 | 268 |
| 3 | 2978 |
| 4 | 43708 |
| 5 | 960912 |
| 6 | 33579112 |
| 7 | 1793526072 |
| 8 | 147518483334 |
| 9 | 18786369968734 |
| 10 | 3677603612834944 |
| 11 | 1107920643675524618 |
| 12 | 515039036348578802392 |
| 13 | 369081216309162786350824 |
[52,268,2978,43708,960912,33579112,1793526072, 147518483334,18786369968734,3677603612834944, 1107920643675524618,515039036348578802392, 369081216309162786350824] |