Number of nonequivalent dissections of an n-gon into n-4 polygons by nonintersecting diagonals up to rotation.

A003445

Number of nonequivalent dissections of an n-gon into n-4 polygons by nonintersecting diagonals up to rotation.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =40a(4) =165a(5) =712a(6) =2912a(7) =11976a(8) =48450a(9) =195580a(10) =784504a(11) =3139396a(12) =12526605a(13) =49902440a(14) =198499200a(15) =788795924a(16) =3131945190a(17) =12428258796a(18) =49295766000a(19) =195464345440a(20) =774857314042

External references