Number of 6-element families of an n-element set such that every 3 members of the family have a nonempty intersection.
A051363
Number of 6-element families of an n-element set such that every 3 members of the family have a nonempty intersection.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =112a(5) =40286a(6) =5485032a(7) =534844548a(8) =45066853496
External references
- oeis: A051363