This page contains some collections of combinatorial data.
Other useful resources include:
Unless otherwise specified, graphs are presented in either graph6 or sparse6 format. The extension on the file name (.g6 or .s6) indicates which is used in each case. See here for information on how to use these formats. Large files are gzipped and have an additional .gz extension.
The graphs page has some collections of general graphs, eulerian graphs, chordal graphs, strongly regular graphs, Ramsey graphs, hypohamiltonian graphs, planar graphs, self-complementary graphs, and highly irregular graphs.
The plane graphs page has some graphs imbedded in the plane that are hard to make using plantri.
The trees page has some small trees classified by order and diameter.
Greechie diagrams are a particular sort of hypergraph used in quantum physics to represent orthomodular lattices. They have their own page.
The Latin squares page has the Latin squares of small order.
The Latin cubes page has the Latin cubes and hypercubes of small order.
The Hadamard matrix page has the Hadamard matrices up to order 32.
Some tournaments, locally-transitive tournaments and acyclic directed graphs are available on the digraphs page.
Some counts of regular multigraphs appear on the integer matrix page.
The dissociated sets page contains some of these things that occur in weighing problems.
Page Master: Brendan McKay, email@example.com and http://cs.anu.edu.au/~bdm.