Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order.
A151591
Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =2a(2) =732a(3) =22360a(4) =386375a(5) =5339202a(6) =66391738a(7) =781132256
External references
- oeis: A151591