Number of partitions of [3n] into n sets of size 3 avoiding any set {3j-2,3j-1,3j} (1<=j<=n).
A370357
Number of partitions of [3n] into n sets of size 3 avoiding any set {3j-2,3j-1,3j} (1<=j<=n).
Terms
- a(0) =1a(1) =0a(2) =9a(3) =252a(4) =14337a(5) =1327104a(6) =182407545a(7) =34906943196
External references
- oeis: A370357