Number of 2-sided n-triangular polyedges.

A159867

Number of 2-sided n-triangular polyedges.

Terms

    a(0) =1a(1) =3a(2) =12a(3) =60a(4) =375a(5) =2613a(6) =19074a(7) =143660a(8) =1101860a(9) =8562292a(10) =67206242a(11) =531804577a(12) =4236708679

External references