Generalized Catalan numbers C(2,4;n)=C(4,2;n).

A116874

Generalized Catalan numbers C(2,4;n)=C(4,2;n).

Terms

    a(0) =1a(1) =1a(2) =6a(3) =76a(4) =1336a(5) =27696a(6) =631776a(7) =15327936a(8) =388158336a(9) =10143429376a(10) =271514492416

External references