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

A128832

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

Terms

    a(0) =1a(1) =81a(2) =2401a(3) =50625a(4) =923521a(5) =15752961a(6) =260144641a(7) =4228250625a(8) =68184176641

External references