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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4140 |
| 2 | 2979512 |
| 3 | 845769156 |
| 4 | 128963937008 |
| 5 | 12312178374428 |
| 6 | 808068266052136 |
| 7 | 38851024440036020 |
| 8 | 1433079196749402592 |
| 9 | 42010343195189042956 |
| 10 | 1006338164048688140184 |
| 11 | 20147943122950516352676 |
| 12 | 343501344081242611693776 |
| 13 | 5066021693205040959806460 |
| 14 | 65505249193380320352457480 |
[1,4140,2979512,845769156,128963937008, 12312178374428,808068266052136,38851024440036020, 1433079196749402592,42010343195189042956, 1006338164048688140184,20147943122950516352676, 343501344081242611693776, 5066021693205040959806460, 65505249193380320352457480] |