Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 4 local maxima.

A159730

Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 4 local maxima.

Terms

    a(0) =0a(1) =2a(2) =15042a(3) =18059184a(4) =11195742340

External references