Number of noncrossing trees with n edges and having degree of the root at least 2.
A102893
Number of noncrossing trees with n edges and having degree of the root at least 2.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =5a(4) =25a(5) =130a(6) =700a(7) =3876a(8) =21945a(9) =126500a(10) =740025a(11) =4382625a(12) =26225628a(13) =158331880a(14) =963250600a(15) =5899491640a(16) =36345082425a(17) =225082957512
External references
- oeis: A102893