Number of Hamiltonian rooted triangulations with n internal nodes and 3 external nodes.

A003122

Number of Hamiltonian rooted triangulations with n internal nodes and 3 external nodes.

Terms

    a(0) =1a(1) =3a(2) =18a(3) =136a(4) =1170a(5) =10962a(6) =109158a(7) =1138032a(8) =12298392a(9) =136803060a(10) =1558392462a(11) =18110005704a(12) =214056200904

External references