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
- oeis: A306000