Number of set partitions of [n] where each subset is again partitioned into eight nonempty subsets.
A327509
Number of set partitions of [n] where each subset is again partitioned into eight nonempty subsets.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =36a(10) =750a(11) =11880a(12) =159027a(13) =1899612a(14) =20912320a(15) =216627840a(16) =2141770488a(17) =20416870188a(18) =189100389270
External references
- oeis: A327509