Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 6 adjacent element pairs in decreasing order.
A151594
Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 6 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =3a(2) =81808a(3) =56283220a(4) =12683975484
External references
- oeis: A151594