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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 986 |
| 3 | 227476 |
| 4 | 403325000 |
| 5 | 377678555920 |
| 6 | 1740121478145440 |
| 7 | 3548967435637000000 |
| 8 | 30329075863614521552000 |
| 9 | 1000883333324929677220000000 |
| 10 | 5056913952254846124761000000000 |
| 11 | 240257191158612376782675694149760000 |
[13,986,227476,403325000,377678555920, 1740121478145440,3548967435637000000, 30329075863614521552000, 1000883333324929677220000000, 5056913952254846124761000000000, 240257191158612376782675694149760000] |