Number of permutations of 7 indistinguishable copies of 1..n with exactly 2 adjacent element pairs in decreasing order.
A151656
Number of permutations of 7 indistinguishable copies of 1..n with exactly 2 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =441a(2) =35623a(3) =1561238a(4) =59287158a(5) =2165511047a(6) =78259307721
External references
- oeis: A151656