Number of monotone Boolean functions of n variables with 2 mincuts. Also number of Sperner systems with 2 blocks.
1, 9, 55, 285, 1351, 6069, 26335, 111645, 465751, 1921029, 7859215, 31964205
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Thu Feb 12 12:14:04 CET 2009 [seqfan] Sequence to A141530