Number of 6-element families of an n-element set such that every 4 members of the family have a nonempty intersection.
A051366
Number of 6-element families of an n-element set such that every 4 members of the family have a nonempty intersection.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =112a(5) =39761a(6) =5318420a(7) =506289623a(8) =41378309308
External references
- oeis: A051366