Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.
A151600
Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =11640a(2) =10421120a(3) =2396959400a(4) =324776205024
External references
- oeis: A151600