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%I #13 Dec 16 2019 11:53:14
%S 4,6,8,10,14,18,20,20,28,30,90,102,126
%N Orders of cubic (i.e., trivalent, 3-regular) distance-regular graphs.
%C "Order" is the number of vertices. Terms are listed from smallest to largest, with duplications when there exist multiple graphs with the same order.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Distance-regular_graph#Cubic_distance-regular_graphs">Cubic distance-regular graphs</a>
%e 4 is a term because the tetrahedron graph is cubic and distance-regular and has order 4.
%e 20 is a term because the dodecahedron graph is cubic and distance-regular and has order 20.
%Y Cf. A328144 (cubic distance-transitive graphs), A075124 (cubic symmetric graphs).
%K nonn,fini,full
%O 1,1
%A _Harry Richman_, Sep 29 2019