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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 136 |
| 3 | 21238 |
| 4 | 15374304 |
| 5 | 52326659814 |
| 6 | 845020424183364 |
| 7 | 65102985676317726176 |
| 8 | 24005912569370916926920192 |
| 9 | 42445533661127789112292364580400 |
| 10 | 360256756545210313397342412375573121875 |
| 11 | 14686785417300337272290307023148088973414062500 |
[4,136,21238,15374304,52326659814,845020424183364, 65102985676317726176,24005912569370916926920192, 42445533661127789112292364580400, 360256756545210313397342412375573121875, 14686785417300337272290307023148088973414062500] |