---
name: "nauty-gentreeg"
section: "1"
platform: "linux"
package: "nauty"
version: "2.8.9+ds-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nauty-gentreeg"
---

# nauty-gentreeg(1)

generate trees

## NAME

nauty-gentreeg - generate trees

## SYNOPSIS

**gentreeg** \[*-D#*\] \[*-Z#:#*\] \[*-ulps*\] \[*-q*\] *n\|n1:n2* \[*res/mod*\] \[*file*\]

## DESCRIPTION

-

  Generate (unrooted) trees.

-

  n, n1:n2 : the number of vertices or a range

-

  Outputs are in order of the number of vertices.

-

  res/mod : only generate subset res out of subsets 0..mod-1

- **-D**#

  : an upper bound for the maximum degree

**-Z**#:# : bounds for the diameter

- **-s**

  : use sparse6 output (default)

- **-p**

  : write a parent array

- **-l**

  : write a level array

- **-u**

  : do not output any graphs, just generate and count them

- **-q**

  : suppress auxiliary output

-

  See program text for much more information.