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

A052389

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

Terms

    a(0) =0a(1) =1a(2) =9a(3) =95a(4) =1286a(5) =20681a(6) =360964a(7) =6452825a(8) =114920766a(9) =2018035121a(10) =34864971944a(11) =593281456505

External references