Number of permutations of n distinct letters (ABCD...) each of which appears 4 times and having three fixed points.

A123292

Number of permutations of n distinct letters (ABCD...) each of which appears 4 times and having three fixed points.

Terms

    a(0) =0a(1) =0a(2) =7136a(3) =12880512a(4) =61907282240

External references