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 A286280 Number of connected arc-transitive graphs of order n. 2
 1, 1, 2, 2, 4, 2, 5, 4, 8, 2, 11, 4, 8, 10, 15, 4, 14, 3, 22, 13, 8, 2, 34, 11, 13, 20, 26, 4, 41 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,3 COMMENTS Care is needed with "symmetric" terminology, which is variously used to mean both arc-transitive and both vertex- and edge-transitive. The first known difference from A133181 (connected vertex- and edge-transitive graphs on n vertices) occurs at a(27), corresponding to the Doyle graph (which is both edge- and vertex-transitive but not arc-transitive). - Eric W. Weisstein, May 13 2017 LINKS Marston Conder, Home Page (Contains tables of regular maps, hypermaps and polytopes, trivalent symmetric graphs, and surface actions) Marston Conder, Connected symmetric (arc-transitive) graphs of order 2 to 30 Eric Weisstein's World of Mathematics, Arc-Transitive Graph Eric Weisstein's World of Mathematics, Doyle Graph Eric Weisstein's World of Mathematics, Edge-Transitive Graph Eric Weisstein's World of Mathematics, Symmetric Graph Eric Weisstein's World of Mathematics, Vertex-Transitive Graph CROSSREFS Cf. A133181 (number of connected vertex- and edge-transitive graphs on n vertices). Cf. A180240 (number of arc-transitive simple graphs on n nodes). Sequence in context: A241814 A088371 A133181 * A290088 A179013 A090397 Adjacent sequences:  A286277 A286278 A286279 * A286281 A286282 A286283 KEYWORD nonn,more AUTHOR N. J. A. Sloane, May 08 2017 STATUS approved

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Last modified August 8 08:27 EDT 2020. Contains 336293 sequences. (Running on oeis4.)