NumberOfDirectedGraphs
NumberOfDirectedGraphs[n]
returns the number of nonisomorphic directed graphs with 
vertices.
NumberOfDirectedGraphs[n,m]
returns the number of nonisomorphic directed graphs with 
vertices and 
edges.
Details and Options
- To use NumberOfDirectedGraphs, you first need to load the Combinatorica Package using Needs["Combinatorica`"].
Wolfram Research (2012), NumberOfDirectedGraphs, Wolfram Language function, https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html.Text
Wolfram Research (2012), NumberOfDirectedGraphs, Wolfram Language function, https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html.
Wolfram Research (2012), NumberOfDirectedGraphs, Wolfram Language function, https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html.CMS
Wolfram Language. 2012. "NumberOfDirectedGraphs." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html.
Wolfram Language. 2012. "NumberOfDirectedGraphs." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html.APA
Wolfram Language. (2012). NumberOfDirectedGraphs. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html
Wolfram Language. (2012). NumberOfDirectedGraphs. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.htmlBibTeX
@misc{reference.wolfram_2025_numberofdirectedgraphs, author="Wolfram Research", title="{NumberOfDirectedGraphs}", year="2012", howpublished="\url{https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html}", note=[Accessed: 26-March-2025
]}BibLaTeX
@online{reference.wolfram_2025_numberofdirectedgraphs, organization={Wolfram Research}, title={NumberOfDirectedGraphs}, year={2012}, url={https://reference.wolfram.com/language/Combinatorica/ref/NumberOfDirectedGraphs.html}, note=[Accessed: 26-March-2025
]}