Number of permutations of the multiset {1,1,1,2,2,2,3,3,3,...,n,n,n} with no two consecutive terms equal.
A193638
Number of permutations of the multiset {1,1,1,2,2,2,3,3,3,...,n,n,n} with no two consecutive terms equal.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =174a(4) =41304a(5) =19606320a(6) =16438575600
External references
- oeis: A193638