Number of permutations of 3 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.
A151635
Number of permutations of 3 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =0a(2) =54a(3) =128124a(4) =40241088a(5) =5904797049a(6) =592030140912
External references
- oeis: A151635