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A033636
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(n-1)!*product( (2*n)!-2*i-1, i=1..n-1).
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0
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1, 21, 1025310, 393143628567690, 4161601591128480023923529880, 3025979870886810157320547152897281546399520600, 316069513961213168272637175554794298273860325049869267706740636689200
(list; graph; refs; listen; history; internal format)
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