Number of permutations of 6 indistinguishable copies of 1..n with exactly 3 adjacent element pairs in decreasing order.
A151652
Number of permutations of 6 indistinguishable copies of 1..n with exactly 3 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =400a(2) =233300a(3) =35138736a(4) =3656408776a(5) =333546436832
External references
- oeis: A151652