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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 7 |
| 3 | -4121 |
| 4 | -56975 |
| 5 | 1929733 |
| 6 | 71236279 |
| 7 | -949628849 |
| 8 | -93127115423 |
| 9 | 20066487805 |
| 10 | 136040198628199 |
| 11 | 1736014871922487 |
| 12 | -219855440620458287 |
| 13 | -6232933639083272459 |
| 14 | 381987420638602610455 |
| 15 | 19102129961742695872927 |
| 16 | -679901742649149297057599 |
[1,13,7,-4121,-56975,1929733,71236279,-949628849, -93127115423,20066487805,136040198628199, 1736014871922487,-219855440620458287, -6232933639083272459,381987420638602610455, 19102129961742695872927,-679901742649149297057599] |