Number of permutations of 6 indistinguishable copies of 1..n with exactly 6 adjacent element pairs in decreasing order.
A151655
Number of permutations of 6 indistinguishable copies of 1..n with exactly 6 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =1a(2) =5703096a(3) =66555527346
External references
- oeis: A151655