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A070780
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Binomial(binomial(n+1,n)^2,n).
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0
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1, 4, 36, 560, 12650, 376992, 13983816, 621216192, 32164253550, 1902231808400, 126524771308936, 9349109217266832, 759825846558448488, 67362990324409227840, 6469590128756692755600
(list; graph; refs; listen; history; internal format)
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