Number of 4-element intersecting families (with not necessarily distinct sets) whose union is an n-element set.

A052390

Number of 4-element intersecting families (with not necessarily distinct sets) whose union is an n-element set.

Terms

    a(0) =1a(1) =7a(2) =71a(3) =956a(4) =15116a(5) =254397a(6) =4318511a(7) =72331966a(8) =1188180386a(9) =19152566087a(10) =303768582701

External references