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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 33 |
| 3 | 3927 |
| 4 | 55602393 |
| 5 | 11147016454528647 |
| 6 | 448011292165037607943004375755833 |
| 7 | 723685043824607606355691108666081531638582859833105061571146291527 |
[1,3,33,3927,55602393,11147016454528647, 448011292165037607943004375755833, 72368504382460760635569110866608153163858285983310\ 5061571146291527] |