Number of linear arrangements of n blue, n red and n green items such that there are no adjacent items of the same color.
A110706
Number of linear arrangements of n blue, n red and n green items such that there are no adjacent items of the same color.
Terms
- a(0) =1a(1) =6a(2) =30a(3) =174a(4) =1092a(5) =7188a(6) =48852a(7) =339720a(8) =2403588a(9) =17236524a(10) =124948668a(11) =913820460a(12) =6732898800a(13) =49918950240a(14) =372104853600
External references
- oeis: A110706