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A111424
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Sum_{i=1..n} (2i)!/i!.
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1
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2, 14, 134, 1814, 32054, 697334, 17994614, 536913014, 18180138614, 688622711414, 28847210769014, 1324142261418614, 66088894793898614, 3563385531547818614, 206406590463275178614, 12782685296230371498614, 842817079876858728618614
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