Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.
A151593
Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =117a(2) =149520a(3) =26591700a(4) =2321730306a(5) =143576370000
External references
- oeis: A151593