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Search: id:A024189
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| A024189 |
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((n+3)!/2)(1/4 - 1/5 + ... + c/(n+3)), where c = (-1)^(n+1). |
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| 3, 3, 78, 186, 4008, 15912, 340560, 1931760, 43139520, 321312960, 7611891840, 70589232000, 1783264896000
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