Number of primitive sorting networks on n elements; also number of rhombic tilings of a 2n-gon.

A006245

Number of primitive sorting networks on n elements; also number of rhombic tilings of a 2n-gon.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =8a(4) =62a(5) =908a(6) =24698a(7) =1232944a(8) =112018190a(9) =18410581880

External references