Number of labeled plane 2-trees on n triangles.
A093197
Number of labeled plane 2-trees on n triangles.
Terms
- a(0) =1a(1) =6a(2) =56a(3) =720a(4) =11880a(5) =240240a(6) =5765760a(7) =160392960a(8) =5079110400a(9) =180503769600
External references
- oeis: A093197