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A004677
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Numerator of 2^n*(3*n-3)!/( ((n-1)!)^3 * (2*n)! ).
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1
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1, 1, 1, 2, 11, 91, 17, 323, 4807, 3289, 8671, 11687, 15283, 10743949, 15189721, 21069613, 1339779509, 1339779509, 101007559, 101007559, 4215217889, 185371558793, 8059632991, 11489264051, 815737747621
(list; graph; refs; listen; history; internal format)
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