Number of 4-element intersecting families (of distinct sets) whose union is an n-element set.

A052391

Number of 4-element intersecting families (of distinct sets) whose union is an n-element set.

Terms

    a(0) =0a(1) =0a(2) =4a(3) =349a(4) =9985a(5) =213230a(6) =4000444a(7) =69940479a(8) =1170549895a(9) =19024433560a(10) =302846958634

External references