The House of Graphs

If you are interested in graph classes, there is another (more mature?) resource: https://www.graphclasses.org/

Such graph collections are super helpful when trying to figure out if some theorem holds for a certain graph class, although only up to a certain size.

I think a lot of these graphs where generated with the genc.c program included in nauty (official website: https://pallini.di.uniroma1.it/ -- unofficial Github repository: https://github.com/lonnen/nauty). With the computing power that we have nowadays it might be easier to just to just run that program.

I see a lot of sequences, number of graphs of a certain type on a certain number of points, and wonder whether these sequences are included in the The On-Line Encyclopedia of Integer Sequences® (OEIS®).

Neat, the UF matrix collection, but for graphs.

I wonder if their adjacency matrices would be interesting...