Number of labeled intersecting set-systems with no singletons covering some subset of {1,...,n}.

A306000

Number of labeled intersecting set-systems with no singletons covering some subset of {1,...,n}.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =16a(4) =864a(5) =1150976a(6) =899934060544

External references