graph_from_atlas: Create a graph from the Graph Atlas

Description

graph_from_atlas creates graphs from the book
‘An Atlas of Graphs’ by
Roland C. Read and Robin J. Wilson. The atlas contains all undirected
graphs with up to seven vertices, numbered from 0 up to 1252. The
graphs are listed:

in increasing order of number of nodes;

for a fixed number of nodes, in increasing order of the number
of edges;

for fixed numbers of nodes and edges, in increasing order of
the degree sequence, for example 111223 < 112222;

for fixed degree sequence, in increasing number of
automorphisms.