Number of labeled antichain hyperforests spanning a subset of {1,...,n}.

A304918

Number of labeled antichain hyperforests spanning a subset of {1,...,n}.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =18a(4) =104a(5) =943a(6) =12133a(7) =203038a(8) =4177755a(9) =101922814a(10) =2874725600a(11) =92009680557

External references