Number of n-tuples where each entry is chosen from the subsets of {1,2,3,4,5} such that the intersection of all n entries contains exactly one element.

A128866

Number of n-tuples where each entry is chosen from the subsets of {1,2,3,4,5} such that the intersection of all n entries contains exactly one element.

Terms

    a(0) =5a(1) =405a(2) =12005a(3) =253125a(4) =4617605a(5) =78764805a(6) =1300723205a(7) =21141253125a(8) =340920883205

External references