Number of finite sets of set partitions of {1,...,n} such that any two have meet {{1},...,{n}}.
A318394
Number of finite sets of set partitions of {1,...,n} such that any two have meet {{1},...,{n}}.
Terms
- a(0) =2a(1) =4a(2) =18a(3) =316a(4) =37492
External references
- oeis: A318394