Number of different ways to select n elements from four sets of n elements under the precondition of choosing at least one element from each set.

A115111

Number of different ways to select n elements from four sets of n elements under the precondition of choosing at least one element from each set.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =256a(4) =5000a(5) =65880a(6) =739508a(7) =7653632a(8) =75687696a(9) =728589000a(10) =6899424840a(11) =64678048600a(12) =602586261420

External references