Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 4 adjacent element pairs in decreasing order.
A151592
Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 4 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =612a(2) =98736a(3) =5299575a(4) =185625504a(5) =5286098790a(6) =134617006656
External references
- oeis: A151592