Number of permutations of 5 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.
A151650
Number of permutations of 5 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =1a(2) =273504a(3) =554083761a(4) =359033166276
External references
- oeis: A151650