Central coefficients T(2n,n) of the Catalan triangle A033184.

A174687

Central coefficients T(2n,n) of the Catalan triangle A033184.

Terms

    a(0) =1a(1) =2a(2) =9a(3) =48a(4) =275a(5) =1638a(6) =9996a(7) =62016a(8) =389367a(9) =2466750a(10) =15737865a(11) =100975680a(12) =650872404a(13) =4211628008a(14) =27341497800a(15) =177996090624

External references