R: Number of rooted / unrooted tree shapes

nRootedShapes {TreeTools} | R Documentation

## Number of rooted / unrooted tree shapes

### Description

`nRootedShapes` and `nUnrootedShapes` give the number of (un)rooted binary trees on n unlabelled leaves.

### Usage

    nRootedShapes

    nUnrootedShapes

### Format

An object of class `integer64` of length 55.

An object of class `integer64` of length 60.

### Source

`nRootedShapes` corresponds to the Wedderburn-Etherington numbers, OEIS A001190

`nUnrootedShapes` is OEIS A000672

[Package TreeTools version 1.7.0 Index]