Number of unrooted triangulations of a hexagon with n internal nodes.

A005502

Number of unrooted triangulations of a hexagon with n internal nodes.

Terms

    a(0) =3a(1) =11a(2) =53a(3) =295a(4) =1867a(5) =12560a(6) =89038a(7) =652198a(8) =4903955a(9) =37627699a(10) =293607612a(11) =2323604832a(12) =18614121391a(13) =150704813812

External references