Number of nonequivalent dissections of a polygon into n quadrilaterals by nonintersecting diagonals rooted at a cell up to rotation.

A005033

Number of nonequivalent dissections of a polygon into n quadrilaterals by nonintersecting diagonals rooted at a cell up to rotation.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =22a(4) =116a(5) =612a(6) =3399a(7) =19228a(8) =111041a(9) =650325a(10) =3856892a(11) =23107896a(12) =139672312a(13) =850624376a(14) =5214734547a(15) =32154708216a(16) =199292232035

External references