Number of permutations of 8 indistinguishable copies of 1..n with exactly 2 adjacent element pairs in decreasing order.
A151658
Number of permutations of 8 indistinguishable copies of 1..n with exactly 2 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =784a(2) =73200a(3) =3884640a(4) =182107936a(5) =8277726192a(6) =373396825488
External references
- oeis: A151658