a(n) = the hypergraph Catalan number C_3(n).

A362168

a(n) = the hypergraph Catalan number C_3(n).

Terms

    a(0) =1a(1) =1a(2) =20a(3) =860a(4) =57200a(5) =5344800a(6) =682612800a(7) =118180104000

External references